before this incident, i don't think headbutting was ever an reaction option for me. elbows, sure. shoving? default, probably. but headbutting? never even came up once.
now, it's at the top of the list. i have been headbutting anything and everything from grandmothers to solid oak doors if they so much as look at me wrong. at that door really deserved it, i tell you what.
headbutt first, ask questions later.