knock out the jackass?? calling with a known coin-flip

[renodoc]

Live MTT. 3 tables left, paying one table. Guy on my left is a complete idiot. Drunk, loud, rude. hitting on the cocktail waitresses and thinks he's going to get some by showing them naked girlie pics on his ipod. total loser.

Blinds are 150-300, I have about 5500 in SB, idiot has 4200 in BB. Folded around and he throws all his chips in out of turn and flips over 88. Floor is called, his bet will stand and action is on me. I have A9o. Clearly there will be a lot of secondary gain if I knock this loser out as he has been an annoyance for the past couple hours.

Who calls here?