LOL something similar happened to my coworker by a friggin seagull. He was eating a sandwich, and holding it in his hand and talking. All of a sudden, a friggin seagull swoops in and next thing you know, there's no sandwich in his hand.
Friggin bastard guys. Seagull assaults happen quite frequently in and around La Jolla Shores near where I work.
More Seagull attack:
http://www.snopes.com/photos/animals/seagull.asp
EDIT: man the guy in the OP pic looks nearly identical to my old boss who lives in La Jolla.