http://www.youtube.com/watch?v=25Rft...earch=headbutt
http://www.youtube.com/watch?v=jnXhplwD1m0 -- super mario
http://www.youtube.com/watch?v=nGW1V...earch=headbutt
http://www.youtube.com/watch?v=3vYsP...earch=headbutt -- Mortal Kombat
http://www.youtube.com/watch?v=3vYsP...earch=headbutt