AK facing a stop and go.

[Yuv]

PokerStars Game #2894477482: Tournament #14115983, Hold'em No Limit - Level XVII (4000/8000) - 2005/10/25 - 22:58:54 (ET)
Table '14115983 83' Seat #8 is the button
Seat 1: noahweinb (173295 in chips)
Seat 2: seek&destroy (124879 in chips)
Seat 3: lee xxx (82303 in chips)
Seat 4: damflamm (78244 in chips)
Seat 5: ellipse (103175 in chips)
Seat 6: z8h4k9 (57180 in chips)
Seat 8: Yuv21 (169894 in chips)
Seat 9: swedenyes (102651 in chips)
noahweinb: posts the ante 400
seek&destroy: posts the ante 400
lee xxx: posts the ante 400
damflamm: posts the ante 400
ellipse: posts the ante 400
z8h4k9: posts the ante 400
Yuv21: posts the ante 400
swedenyes: posts the ante 400
swedenyes: posts small blind 4000
noahweinb: posts big blind 8000
*** HOLE CARDS ***
Dealt to Yuv21 [Ah Ks]
seek&destroy: raises 8000 to 16000
lee xxx: folds
damflamm: folds
ellipse: folds
z8h4k9: folds
Yuv21: raises 48000 to 64000
swedenyes: folds
noahweinb: folds
seek&destroy: calls 48000
*** FLOP *** [2c Js 4d]
seek&destroy: bets 60479 and is all-in

Havn't played with villian alot, but he seems like a good player. We went head to head before when I had AA and he folded QQ (so he said) on a river push, with a ragged board.

this is a very clear stop n go, he pushed in a mili-sec. So what's his range here? He obviously wants me to fold.