There's always a better time

Full Tilt Poker Game #_: $5 + $0.50 Sit & Go (_), Table 1 - 20/40 - No Limit Hold'em - 20:24:17 ET - 2007/09/28
Seat 1: (1,400)
Seat 2: villain (1,415)
Seat 3: (2,095)
Seat 4: (900)
Seat 5: (1,455)
Seat 6: (1,250)
Seat 7: (1,320)
Seat 8: (1,200)
Seat 9: hero (2,465)
villain posts the small blind of 20
Seat 3 posts the big blind of 40
The button is in seat #1
*** HOLE CARDS ***
Dealt to hero [As 4s]
Seat 4 folds
Seat 5 folds
Seat 6 folds
Seat 7 folds
Seat 8 folds

And ace in the cut-off, folded around? Let's steal.

hero raises to 140
Seat 1 folds
villain calls 120
Seat 3 calls 100
*** FLOP *** [Ks Ac Jh]
villain bets 210
Seat 3 folds

Maybe he has me out-kicked, maybe he doesn't. If he does have an ace, maybe I can make him think hard about QT. I need to raise here anyway so as to not give out a "free" card, but a raise here is enough of a fraction of his stack that he'll be committed, so let's just commit him now.

hero raises to 2,325, and is all in

At this point the villain calls me a bully in the chat window. He then thinks for a very long time, and then...

villain calls 1,065, and is all in
hero shows [As 4s]
villain shows [Ts Kd]

?!

We've not gotten very deep into this tournament. Would I really, really throw down for half my chips with a hand that could be beaten by kings in this spot? I mean, maybe if he was really short, but if he was short, then he'd be pot committed, which would make him unbluffable.

If he knew his king was no good, was the 4 outer inside straight draw really worth his entire tournament life?

Uncalled bet of 1,050 returned to hero
*** TURN *** [Ks Ac Jh] [Ah]
*** RIVER *** [Ks Ac Jh Ah] [7h]
hero shows three of a kind, Aces
villain shows two pair, Aces and Kings
hero wins the pot (2,970) with three of a kind, Aces
villain stands up
*** SUMMARY ***
Total pot 2,970 | Rake 0
Board: [Ks Ac Jh Ah 7h]
Seat 1: (button) didn't bet (folded)
Seat 2: villain (small blind) showed [Ts Kd] and lost with two pair, Aces and Kings
Seat 3: (big blind) folded on the Flop
Seat 4: didn't bet (folded)
Seat 5: didn't bet (folded)
Seat 6: didn't bet (folded)
Seat 7: didn't bet (folded)
Seat 8: didn't bet (folded)
Seat 9: hero showed [As 4s] and won (2,970) with three of a kind, Aces