heres the situation...late in tourney there is about 39 players left, ive got 25000 in chips. my table is very tight aggressive but one player (probably the best tourney player at the table, very smart aggressive, kinda controlled chaos) anyways need some feedback. villain has been preflop raising lots and always follows with a continuation bet after flop..blinds are 200 400 folds around to him he makes it 1600 to go, i call with 99 so does the bb...flop comes down 9h Th 2h...he checks im on the button so i bet the pot 5000, bb folds...to the maniac...he thinks for a bit and moves all in for 21000 total...now he was 4th in chips and i was 2nd...not sure what to do here. if i fold i still have about 20000 and still in good position...if i call im probably behind or he has an Ah or overpair...(winner of this hand would have about a 16k lead..if i win its over 20k) im not sure if this is a stupid post or not...what would you put him on..this is the first time he has checked after a raise, then he check raises all in...do you do that with the nuts? or is he doing it with just an Ah, i dont think doing this with an overpair is a good play, its either Ah or he has it? this late in the tourney i figured he had it...anyways done rambling...what would you do, what does he have? (is an obvious call if you cant care about placing, 20th was the cut off)