public void endContact(Contact c) {
		
		Fixture fa = c.getFixtureA(); 
		Fixture fb = c.getFixtureB();
		
		if(fa == null || fb == null) return;
		
		if(fa.getUserData() != null && fa.getUserData().equals("foot")) {
			numFootContacts--;
		}
		if(fb.getUserData() != null && fb.getUserData().equals("foot")) {
			numFootContacts--;
		}
		
	}