headbutt

It's not clear whether the AC was too high or too low.

Bloomberg and Pele, not headbutting. (Via NYCMayorsOffice Twitter) Premium Rush's Headbutt-gate,

Flickr user Paolo Mastrangelo Breffny Flynn, the man arrested after headbutting

Gordon-Levitt's bike crash on the Premium Rush set. (Via Joseph Gordon-Levitt's

Kiefer Sutherland, left, and Jack McCollough, right It's a miracle worthy

The saga of Kiefer Sutherland's post-Costume Institute Party of the Year

Photographs of Kiefer Sutherland leaving his apartment to surrender to the