david cossio hand (AQ) on WSOP final table

Im pretty sure I've seen him post on this site before, so Im not trying to call him out or anything. Also know that bringing up hands you busted on is prob. bad form, but im gonna do it anyway.

I was idly watching the WSOP last night, and i noticed someone limp in the SB with AQ. Hudak checked in the BB and proceeded to hit the flop hard. I started thinking to myself, why, oh why would you limp with AQ. I think its suicide, but I then realized the player, recognized his name, and saw that he had cashed before. so now i know that he had a plan and was not merely donkin it up.

So i ask, do any of you do this? If so, what is the thinking behind it. I can see some value in limping with AK behind some callers, or maybe open limping with AK to play the hand in position, but open limping out of position... the only thing i can think is that Hudak may have been overly aggressive, and cossio wanted him to raise, so he could come over with a push.

anyway, i am really interested in knowing the thought process behind this hand, and the history to the table that made him limp with AQ.