diff --git a/source/enemy/ngeneric.cpp b/source/enemy/ngeneric.cpp
index 77e28a839..849cf9579 100644
--- a/source/enemy/ngeneric.cpp
+++ b/source/enemy/ngeneric.cpp
@@ -99,11 +99,11 @@ void CNpc::processGenericGetUserDist( int _frames, s32 *distX, s32 *distY )
 	*distY = playerPos.vy - this->Pos.vy;
 }
 
-void CNpc::processGenericFixedPathWalk( int _frames, s32 *moveX, s32 *moveY )
+void CNpc::processGenericFixedPathWalk( int _frames, s32 *moveX, s32 *moveY, s32 *heading )
 {
 	s32 maxHeight = 10;
 	s32 distX, distY;
-	s32 fallSpeed = 5;
+	s32 fallSpeed = 2;
 	s8 yMovement = fallSpeed * _frames;
 	s32 groundHeight;
 
@@ -112,7 +112,7 @@ void CNpc::processGenericFixedPathWalk( int _frames, s32 *moveX, s32 *moveY )
 
 	// ignore y component of waypoint, since we are stuck to the ground
 
-	if ( m_npcPath.think2D( Pos, &distX, &distY ) )
+	if ( m_npcPath.think2D( Pos, &distX, &distY, heading ) )
 	{
 		// path has finished, waypoint has changed, or there are no waypoints - do not move horizontally
 
diff --git a/source/enemy/npc.cpp b/source/enemy/npc.cpp
index ce8110008..4c6e57eb4 100644
--- a/source/enemy/npc.cpp
+++ b/source/enemy/npc.cpp
@@ -54,7 +54,7 @@ class CLayerCollision	*CNpc::m_layerCollision;
 
 void CNpc::init()
 {
-	m_type = NPC_FISH_FOLK;
+	m_type = NPC_SHARK_MAN;
 
 	m_heading = m_fireHeading = 0;
 	m_movementTimer = 0;
@@ -723,7 +723,7 @@ void CNpc::processMovement(int _frames)
 
 		case NPC_MOVEMENT_FIXED_PATH_WALK:
 		{
-			processGenericFixedPathWalk( _frames, &moveX, &moveY );
+			processGenericFixedPathWalk( _frames, &moveX, &moveY, &m_heading );
 
 			break;
 		}
diff --git a/source/enemy/npc.h b/source/enemy/npc.h
index 2d6cc0474..8e5693f8c 100644
--- a/source/enemy/npc.h
+++ b/source/enemy/npc.h
@@ -271,7 +271,7 @@ protected:
 
 	void				processGenericGotoTarget( int _frames, s32 xDist, s32 yDist, s32 speed );
 	void				processGenericGetUserDist( int _frames, s32 *distX, s32 *distY );
-	void				processGenericFixedPathWalk( int _frames, s32 *moveX, s32 *moveY );
+	void				processGenericFixedPathWalk( int _frames, s32 *moveX, s32 *moveY, s32 *heading );
 
 	// small jellyfish functions
 
diff --git a/source/enemy/npcdata.cpp b/source/enemy/npcdata.cpp
index 9af3376e7..55186bd15 100644
--- a/source/enemy/npcdata.cpp
+++ b/source/enemy/npcdata.cpp
@@ -276,7 +276,7 @@ CNpc::NPC_DATA CNpc::m_data[NPC_UNIT_TYPE_MAX] =
 	{	// NPC_PRICKLY_BUG
 		NPC_INIT_DEFAULT,
 		NPC_SENSOR_NONE,
-		NPC_MOVEMENT_FIXED_PATH,
+		NPC_MOVEMENT_FIXED_PATH_WALK,
 		NPC_MOVEMENT_MODIFIER_NONE,
 		NPC_CLOSE_NONE,
 		NPC_TIMER_NONE,
@@ -346,7 +346,7 @@ CNpc::NPC_DATA CNpc::m_data[NPC_UNIT_TYPE_MAX] =
 	{	// NPC_HERMIT_CRAB
 		NPC_INIT_DEFAULT,
 		NPC_SENSOR_NONE,
-		NPC_MOVEMENT_FIXED_PATH,
+		NPC_MOVEMENT_FIXED_PATH_WALK,
 		NPC_MOVEMENT_MODIFIER_NONE,
 		NPC_CLOSE_NONE,
 		NPC_TIMER_NONE,
@@ -388,7 +388,7 @@ CNpc::NPC_DATA CNpc::m_data[NPC_UNIT_TYPE_MAX] =
 	{	// NPC_SPIDER_CRAB
 		NPC_INIT_DEFAULT,
 		NPC_SENSOR_SPIDER_CRAB_USER_CLOSE,
-		NPC_MOVEMENT_FIXED_PATH,
+		NPC_MOVEMENT_FIXED_PATH_WALK,
 		NPC_MOVEMENT_MODIFIER_NONE,
 		NPC_CLOSE_SPIDER_CRAB_ATTACK,
 		NPC_TIMER_NONE,
@@ -430,7 +430,7 @@ CNpc::NPC_DATA CNpc::m_data[NPC_UNIT_TYPE_MAX] =
 	{	// NPC_ZOMBIE_FISH_FOLK
 		NPC_INIT_FISH_FOLK,
 		NPC_SENSOR_NONE,
-		NPC_MOVEMENT_FIXED_PATH,
+		NPC_MOVEMENT_FIXED_PATH_WALK,
 		NPC_MOVEMENT_MODIFIER_FISH_FOLK,
 		NPC_CLOSE_NONE,
 		NPC_TIMER_NONE,
@@ -500,7 +500,7 @@ CNpc::NPC_DATA CNpc::m_data[NPC_UNIT_TYPE_MAX] =
 	{	// NPC_SHARK_MAN
 		NPC_INIT_DEFAULT,
 		NPC_SENSOR_GENERIC_USER_VISIBLE,
-		NPC_MOVEMENT_FIXED_PATH,
+		NPC_MOVEMENT_FIXED_PATH_WALK,
 		NPC_MOVEMENT_MODIFIER_NONE,
 		NPC_CLOSE_SHARK_MAN_ATTACK,
 		NPC_TIMER_NONE,
diff --git a/source/enemy/npcpath.cpp b/source/enemy/npcpath.cpp
index cf4aeb751..777ba0847 100644
--- a/source/enemy/npcpath.cpp
+++ b/source/enemy/npcpath.cpp
@@ -231,7 +231,7 @@ s32 CNpcPath::think( DVECTOR currentPos, bool *pathComplete, bool *waypointChang
 	return( headingToTarget );
 }
 
-bool CNpcPath::think2D( DVECTOR currentPos, s32 *distX, s32 *distY )
+bool CNpcPath::think2D( DVECTOR currentPos, s32 *distX, s32 *distY, s32 *heading )
 {
 	bool pointChange = false;
 
@@ -256,5 +256,14 @@ bool CNpcPath::think2D( DVECTOR currentPos, s32 *distX, s32 *distY )
 		incPath();
 	}
 
+	if ( *distX > 0 )
+	{
+		*heading = 0;
+	}
+	else
+	{
+		*heading = 2048;
+	}
+
 	return( pointChange );
 }
\ No newline at end of file
diff --git a/source/enemy/npcpath.h b/source/enemy/npcpath.h
index 7378f4e10..95b6524c2 100644
--- a/source/enemy/npcpath.h
+++ b/source/enemy/npcpath.h
@@ -52,7 +52,7 @@ public:
 	void			resetPath();
 	void			reversePathDir();
 	s32				think( DVECTOR currentPos, bool *pathComplete, bool *waypointChange );
-	bool			think2D( DVECTOR currentPos, s32 *distX, s32 *distY );
+	bool			think2D( DVECTOR currentPos, s32 *distX, s32 *distY, s32 *heading );
 	bool			getDistToNextWaypoint( DVECTOR currentPos, s32 *distX, s32 *distY );
 };
 
diff --git a/source/enemy/nscrab.cpp b/source/enemy/nscrab.cpp
index d6de50bd3..29ac680c1 100644
--- a/source/enemy/nscrab.cpp
+++ b/source/enemy/nscrab.cpp
@@ -27,34 +27,35 @@
 void CNpc::processCloseSpiderCrabAttack( int _frames )
 {
 	s32 velocity;
+	DVECTOR newPos = Pos;
 
 	velocity = m_velocity * _frames;
 
 	if ( m_extendDir == EXTEND_RIGHT )
 	{
-		Pos.vx += velocity;
+		newPos.vx += velocity;
 		m_heading = 0;
 	}
 	else
 	{
-		Pos.vx -= velocity;
+		newPos.vx -= velocity;
 		m_heading = 2048;
 	}
 
-	s32 horizontalExtension = abs( Pos.vx - m_base.vx );
+	s32 horizontalExtension = abs( newPos.vx - m_base.vx );
 
 	if ( horizontalExtension > 128 )
 	{
 		if ( m_extendDir == EXTEND_RIGHT )
 		{
-			Pos.vx = m_base.vx + 128;
+			newPos.vx = m_base.vx + 128;
 		}
 		else
 		{
-			Pos.vx = m_base.vx - 128;
+			newPos.vx = m_base.vx - 128;
 		}
 
-		Pos.vy = m_base.vy;
+		newPos.vy = m_base.vy;
 
 		m_controlFunc = NPC_CONTROL_MOVEMENT;
 		m_timerFunc = NPC_TIMER_ATTACK_DONE;
@@ -63,6 +64,22 @@ void CNpc::processCloseSpiderCrabAttack( int _frames )
 	}
 	else
 	{
-		Pos.vy = m_base.vy - ( ( 20 * rsin( horizontalExtension << 4 ) ) >> 12 );
+		newPos.vy = m_base.vy - ( ( 20 * rsin( horizontalExtension << 4 ) ) >> 12 );
+	}
+
+	// check for collision with ground
+
+	if ( m_layerCollision->getHeightFromGround( newPos.vx, newPos.vy ) < 0 )
+	{
+		// abort jump
+
+		m_controlFunc = NPC_CONTROL_MOVEMENT;
+		m_timerFunc = NPC_TIMER_ATTACK_DONE;
+		m_timerTimer = GameState::getOneSecondInFrames();
+		m_sensorFunc = NPC_SENSOR_NONE;
+	}
+	else
+	{
+		Pos = newPos;
 	}
 }
diff --git a/source/enemy/nshrkman.cpp b/source/enemy/nshrkman.cpp
index 2521acc3c..e9c19ba83 100644
--- a/source/enemy/nshrkman.cpp
+++ b/source/enemy/nshrkman.cpp
@@ -26,8 +26,13 @@
 
 void CNpc::processCloseSharkManAttack( int _frames )
 {
-	s32 moveX, moveY;
+	s32 moveX = 0, moveY = 0;
+	s32 groundHeight;
 	s16 decDir, incDir, moveDist;
+	s32 direction;
+	s32 maxHeight = 10;
+	s32 fallSpeed = 2;
+	s8 yMovement = fallSpeed * _frames;
 
 	s16 headingToPlayer = ratan2( playerYDist, playerXDist );
 
@@ -62,32 +67,47 @@ void CNpc::processCloseSharkManAttack( int _frames )
 	{
 		// continue charge
 
-		if ( playerXDist < 0 )
+		if ( playerXDist != 0 )
 		{
-			m_heading = 2048;
+			direction = playerXDist / abs( playerXDist );
 		}
 		else
 		{
-			m_heading = 0;
+			direction = 1;
 		}
 
-		s32 preShiftX = _frames * m_velocity * rcos( m_heading );
-		s32 preShiftY = _frames * m_velocity * rsin( m_heading );
-
-		moveX = preShiftX >> 12;
-		if ( !moveX && preShiftX )
+		if ( m_layerCollision->getHeightFromGround( Pos.vx + ( _frames * m_velocity * direction ), Pos.vy ) < -maxHeight )
 		{
-			moveX = preShiftX / abs( preShiftX );
-		}
+			// there is an obstacle in the way, abort
 
-		moveY = preShiftY >> 12;
-		if ( !moveY && preShiftY )
+			m_controlFunc = NPC_CONTROL_MOVEMENT;
+			m_timerFunc = NPC_TIMER_ATTACK_DONE;
+			m_timerTimer = GameState::getOneSecondInFrames();
+			m_sensorFunc = NPC_SENSOR_NONE;
+		}
+		else
 		{
-			moveY = preShiftY / abs( preShiftY );
-		}
+			// check for vertical movement
 
-		Pos.vx += moveX;
-		Pos.vy += moveY;
+			groundHeight = m_layerCollision->getHeightFromGround( Pos.vx, Pos.vy, yMovement + 16 );
+
+			if ( groundHeight <= yMovement )
+			{
+				// groundHeight <= yMovement indicates either just above ground or on or below ground
+
+				moveX = _frames * m_velocity * direction;
+				moveY = groundHeight;
+			}
+			else
+			{
+				// fall
+
+				moveY = yMovement;
+			}
+
+			Pos.vx += moveX;
+			Pos.vy += moveY;
+		}
 	}
 	else
 	{