diff --git a/source/enemy/nhcrab.cpp b/source/enemy/nhcrab.cpp
index cc12260d5..c65d1835d 100644
--- a/source/enemy/nhcrab.cpp
+++ b/source/enemy/nhcrab.cpp
@@ -47,7 +47,7 @@ bool CNpcHermitCrabEnemy::processSensor()
 
 		default:
 		{
-			if ( playerXDistSqr + playerYDistSqr < 400 )
+			if ( playerXDistSqr + playerYDistSqr < 4000 )
 			{
 				m_controlFunc = NPC_CONTROL_CLOSE;
 
diff --git a/source/enemy/nmjfish.cpp b/source/enemy/nmjfish.cpp
index b8c4581c5..a9e9b56a1 100644
--- a/source/enemy/nmjfish.cpp
+++ b/source/enemy/nmjfish.cpp
@@ -343,3 +343,9 @@ void CNpcMotherJellyfishEnemy::render()
 		}
 	}
 }
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+void CNpcMotherJellyfishEnemy::processUserCollision( CThing *thisThing )
+{
+}
diff --git a/source/enemy/nmjfish.h b/source/enemy/nmjfish.h
index 950256095..748cc8b13 100644
--- a/source/enemy/nmjfish.h
+++ b/source/enemy/nmjfish.h
@@ -24,6 +24,7 @@ protected:
 	virtual void		processClose( int _frames );
 	virtual void		processMovement( int _frames );
 	void				spawnJellyfish( int _frames );
+	virtual void		processUserCollision( CThing *thisThing );
 
 	enum NPC_MOTHER_JELLYFISH_STATE
 	{
diff --git a/source/enemy/npc.cpp b/source/enemy/npc.cpp
index 412ffd708..80d99fc89 100644
--- a/source/enemy/npc.cpp
+++ b/source/enemy/npc.cpp
@@ -874,12 +874,15 @@ void CNpcEnemy::collidedWith( CThing *_thisThing )
 									m_oldControlFunc = m_controlFunc;
 									m_controlFunc = NPC_CONTROL_COLLISION;
 
+									processUserCollision( _thisThing );
+
 									break;
 								}
 
 								case DETECT_ATTACK_COLLISION_GENERIC:
 								{
 									processAttackCollision();
+									processUserCollision( _thisThing );
 
 									break;
 								}
@@ -1456,6 +1459,46 @@ void CNpcEnemy::processEnemyCollision( CThing *thisThing )
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
+void CNpcEnemy::processUserCollision( CThing *thisThing )
+{
+	DVECTOR otherPos = thisThing->getPos();
+	DVECTOR otherDelta = thisThing->getPosDelta();
+
+	s32 xDist = Pos.vx - otherPos.vx;
+	s32 yDist = Pos.vy - otherPos.vy;
+
+	s16 headingFromTarget = ratan2( yDist, xDist );
+
+	if ( ( xDist > 0 && otherDelta.vx < 0 ) || ( xDist < 0 && otherDelta.vx > 0 ) )
+	{
+		otherDelta.vx = -otherDelta.vx;
+	}
+
+	if ( ( yDist > 0 && otherDelta.vy < 0 ) || ( yDist < 0 && otherDelta.vy > 0 ) )
+	{
+		otherDelta.vy = -otherDelta.vy;
+	}
+
+	Pos.vx += otherDelta.vx;
+	Pos.vy += otherDelta.vy;
+
+	m_heading = headingFromTarget;
+
+	s32 waypointXDist;
+	s32 waypointYDist;
+
+	m_npcPath.getDistToNextWaypoint( Pos, &waypointXDist, &waypointYDist );
+
+	if ( ( xDist > 0 && waypointXDist < 0 ) || ( xDist < 0 && waypointXDist > 0 ) )
+	{
+		// try next waypoint to get around other enemy
+
+		m_npcPath.incPath();
+	}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
 bool CNpcEnemy::processCoralBlowerMovement( int _frames, s32 xDist, s32 yDist, u8 destroyAtTarget )
 {
 	s32 moveX, moveY;
diff --git a/source/enemy/npc.h b/source/enemy/npc.h
index 1538c3ef0..ea301a9db 100644
--- a/source/enemy/npc.h
+++ b/source/enemy/npc.h
@@ -249,6 +249,7 @@ protected:
 	void				processGenericFixedPathWalk( int _frames, s32 *moveX, s32 *moveY );
 	bool				processGroundCollisionReverse( s32 *moveX, s32 *moveY );
 	virtual void		processEnemyCollision( CThing *thisThing );
+	virtual void		processUserCollision( CThing *thisThing );
 
 	void				reinit();
 
diff --git a/source/enemy/nscrab.cpp b/source/enemy/nscrab.cpp
index d5d569e92..350963efd 100644
--- a/source/enemy/nscrab.cpp
+++ b/source/enemy/nscrab.cpp
@@ -59,7 +59,7 @@ bool CNpcSpiderCrabEnemy::processSensor()
 
 		default:
 		{
-			if ( playerXDistSqr + playerYDistSqr < 10000 )
+			if ( abs( playerXDist ) < 64 )
 			{
 				// only attack if within path extents
 
@@ -70,7 +70,7 @@ bool CNpcSpiderCrabEnemy::processSensor()
 				{
 					m_extendDir = EXTEND_LEFT;
 
-					if ( ( Pos.vx + playerXDist - 128 ) < minX )
+					if ( ( Pos.vx + playerXDist ) < minX )
 					{
 						return( false );
 					}
@@ -79,12 +79,14 @@ bool CNpcSpiderCrabEnemy::processSensor()
 				{
 					m_extendDir = EXTEND_RIGHT;
 
-					if ( ( Pos.vx + playerXDist + 128 ) > maxX )
+					if ( ( Pos.vx + playerXDist ) > maxX )
 					{
 						return( false );
 					}
 				}
 
+				m_attackDist = abs( playerXDist );
+
 				m_controlFunc = NPC_CONTROL_CLOSE;
 				m_extension = 0;
 				m_velocity = 5;
@@ -129,19 +131,19 @@ void CNpcSpiderCrabEnemy::processClose( int _frames )
 
 	bool completed = false;
 
-	if ( m_extension > 128 )
+	if ( m_extension > m_attackDist )
 	{
-		m_extension = 128;
+		m_extension = m_attackDist;
 		completed = true;
 	}
-	else if ( m_extension < -128 )
+	else if ( m_extension < -m_attackDist )
 	{
-		m_extension = -128;
+		m_extension = -m_attackDist;
 		completed = true;
 	}
 
 	newPos.vx = m_base.vx + m_extension;
-	newPos.vy = m_base.vy - ( ( 20 * rsin( abs( m_extension ) << 4 ) ) >> 12 );
+	newPos.vy = m_base.vy - ( ( SPIDER_CRAB_HEIGHT * rsin( abs( ( m_extension << 11 ) / m_attackDist ) ) ) >> 12 );
 
 	s32 minX, maxX;
 
diff --git a/source/enemy/nscrab.h b/source/enemy/nscrab.h
index 21523bda2..cd8094445 100644
--- a/source/enemy/nscrab.h
+++ b/source/enemy/nscrab.h
@@ -32,11 +32,19 @@ protected:
 	virtual void		processMovement( int _frames );
 	void				processSpiderCrabInitJumpMovement( int _frames );
 
+	s32					m_attackDist;
+
 	enum NPC_SPIDER_CRAB_STATE
 	{
 		SPIDER_CRAB_DEFAULT = 0,
 		SPIDER_CRAB_INIT_JUMP = 1,
 	};
+
+	enum NPC_SPIDER_CRAB_CONSTANTS
+	{
+		SPIDER_CRAB_EXTENSION = 64,
+		SPIDER_CRAB_HEIGHT = 50,
+	};
 };
 
 #endif
diff --git a/source/platform/pbranch.cpp b/source/platform/pbranch.cpp
index 30366604a..d983ae56f 100644
--- a/source/platform/pbranch.cpp
+++ b/source/platform/pbranch.cpp
@@ -36,7 +36,17 @@
 
 void CNpcBranchPlatform::postInit()
 {
-	CNpcPlatform::postInit();
+	sBBox boundingBox = m_modelGfx->GetBBox();
+	setCollisionSize( ( boundingBox.XMax - boundingBox.XMin ) << 1, 50 + ( boundingBox.YMax - boundingBox.YMin ) );
+
+	if ( m_reversed )
+	{
+		setCollisionCentreOffset( boundingBox.XMax, 18 + ( ( boundingBox.YMax + boundingBox.YMin ) >> 1 ) );
+	}
+	else
+	{
+		setCollisionCentreOffset( boundingBox.XMin, 18 + ( ( boundingBox.YMax + boundingBox.YMin ) >> 1 ) );
+	}
 
 	m_angularVelocity = 0;
 }
@@ -300,3 +310,27 @@ void CNpcBranchPlatform::render()
 		}
 	}
 }
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+void CNpcBranchPlatform::calculateBoundingBoxSize()
+{
+	int		angle;
+	DVECTOR	centre;
+	int		length;
+	int		x1,y1,x2,y2;
+
+	angle=getCollisionAngle();
+	centre=getCollisionCentre();
+
+	//halfLength=m_platformWidth/2;
+	sBBox boundingBox = m_modelGfx->GetBBox();
+	length = ( boundingBox.XMax - boundingBox.XMin );
+
+	x1=-length*mcos(angle&4095)>>12;
+	y1=-length*msin(angle&4095)>>12;
+	x2=+length*mcos(angle&4095)>>12;
+	y2=+length*msin(angle&4095)>>12;
+
+	setCollisionSize(abs(x2-x1),50 + abs(y2-y1)+PLATFORMCOLLISIONHEIGHT);
+}
diff --git a/source/platform/pbranch.h b/source/platform/pbranch.h
index 5f5d8e7c4..c9117f25f 100644
--- a/source/platform/pbranch.h
+++ b/source/platform/pbranch.h
@@ -28,6 +28,7 @@ protected:
 	virtual void		processMovement( int _frames );
 
 	virtual void		collidedWith(CThing *_thisThing);
+	virtual void		calculateBoundingBoxSize();
 
 	s32					m_angularVelocity;
 	u8					m_reversed;
diff --git a/source/platform/platform.h b/source/platform/platform.h
index 18f2ce429..ab28cd6ea 100644
--- a/source/platform/platform.h
+++ b/source/platform/platform.h
@@ -218,7 +218,7 @@ protected:
 
 protected:
 	virtual void	setCollisionAngle(int newAngle);	// Actually.. this probly doesn't need to be in the base calss anymore.. :/
-	void			calculateBoundingBoxSize();
+	virtual void	calculateBoundingBoxSize();
 
 
 };