diff --git a/source/hazard/hmasher.cpp b/source/hazard/hmasher.cpp
new file mode 100644
index 000000000..ead2ca51a
--- /dev/null
+++ b/source/hazard/hmasher.cpp
@@ -0,0 +1,82 @@
+/*=========================================================================
+
+	hmasher.cpp
+
+	Author:		CRB
+	Created: 
+	Project:	Spongebob
+	Purpose: 
+
+	Copyright (c) 2001 Climax Development Ltd
+
+===========================================================================*/
+
+#ifndef __HAZARD_HMASHER_H__
+#include "hazard\hmasher.h"
+#endif
+
+#ifndef __LAYER_COLLISION_H__
+#include "level\layercollision.h"
+#endif
+
+void CNpcMasherHazard::init()
+{
+	CNpcHazard::init();
+
+	m_state = MASHER_DROPPING;
+}
+
+void CNpcMasherHazard::processMovement( int _frames )
+{
+	switch ( m_state )
+	{
+		case MASHER_DROPPING:
+		{
+			s8 yMovement = 3 * _frames;
+
+			s8 groundHeight;
+
+			groundHeight = m_layerCollision->getHeightFromGround( Pos.vx, Pos.vy, yMovement + 16 );
+
+			if ( groundHeight < yMovement )
+			{
+				// colliding with ground
+
+				Pos.vy += groundHeight;
+
+				// pause and change direction
+
+				m_state = MASHER_RISING;
+			}
+			else
+			{
+				// drop down
+
+				Pos.vy += yMovement;
+			}
+
+			break;
+		}
+
+		case MASHER_RISING:
+		{
+			if ( m_base.vx - Pos.vx == 0 && m_base.vy - Pos.vy == 0 )
+			{
+				m_state = MASHER_DROPPING;
+			}
+			else
+			{
+				// return to original position
+
+				Pos.vy -= 3 * _frames;
+
+				if ( Pos.vy < m_base.vy )
+				{
+					Pos.vy = m_base.vy;
+				}
+			}
+
+			break;
+		}
+	}
+}
diff --git a/source/hazard/hmasher.h b/source/hazard/hmasher.h
new file mode 100644
index 000000000..de1ce816f
--- /dev/null
+++ b/source/hazard/hmasher.h
@@ -0,0 +1,37 @@
+/*=========================================================================
+
+	hmasher.h
+
+	Author:		CRB
+	Created: 
+	Project:	Spongebob
+	Purpose: 
+
+	Copyright (c) 2001 Climax Development Ltd
+
+===========================================================================*/
+
+#ifndef __HAZARD_HMASHER_H__
+#define __HAZARD_HMASHER_H__
+
+#ifndef __HAZARD_HAZARD_H__
+#include "hazard\hazard.h"
+#endif
+
+class CNpcMasherHazard : public CNpcHazard
+{
+public:
+	void				init();
+protected:
+	void				processMovement( int _frames );
+
+	enum MASHER_STATE
+	{
+		MASHER_DROPPING,
+		MASHER_RISING,
+	};
+
+	MASHER_STATE		m_state;
+};
+
+#endif
\ No newline at end of file