Quote Originally Posted by Ben Gash
Not go down like a sack of sh*t when somebody headbutts you in the chest!! I mean really, who headbutts someone in the chest?
looks like he got him right in the xiphoid process. that'll take a dude down.

besides that, I can think of a lot of guys including myself who would use the headbutt. mostly to the face a la "the nutter"TM