I was playing well, chip leader or near to on the final table.  I dont know what happened but the player had been raising me alot in this position, and I felt it too much for him to have a hand each time so I decided next time I would resteal, with disasterous consequences (although I did laugh alot so it was worth it)

PokerStars Hand #78784810353: Tournament #546238175, $1.29+$0.21 USD Hold'em No Limit - Level VIII (150/300) - 2012/04/13 5:03:15 ET Table '546238175 1' 6-max Seat #3 is the button Seat 1: Chlowacker (3170 in chips) Seat 2: easyguy1957 (4330 in chips) Seat 3: ArtPijon (3835 in chips) Seat 4: Haftizin (6085 in chips) Seat 5: momfight (6080 in chips) Seat 6: semtexcally (3500 in chips)
Chlowacker: posts the ante 25
easyguy1957: posts the ante 25
ArtPijon: posts the ante 25
Haftizin: posts the ante 25
momfight: posts the ante 25
semtexcally: posts the ante 25
Haftizin: posts small blind 150
momfight: posts big blind 300
*** HOLE CARDS ***
Dealt to momfight [Ac 4d]
semtexcally: folds
Chlowacker: folds
easyguy1957: folds
ArtPijon: folds
Haftizin: raises 300 to 600
momfight: raises 5455 to 6055 and is all-in
Haftizin: calls 5455
*** FLOP *** [Kc Kd 7c]
*** TURN *** [Kc Kd 7c] [Td]
*** RIVER *** [Kc Kd 7c Td] [8h]
*** SHOW DOWN ***
Haftizin: shows [As Ah] (two pair, Aces and Kings)
momfight: shows [Ac 4d] (a pair of Kings) Haftizin collected 12260 from pot momfight finished the tournament in 6th place
*** SUMMARY ***
Total pot 12260 | Rake 0
Board [Kc Kd 7c Td 8h]
Seat 1: Chlowacker folded before Flop (didn't bet) Seat 2: easyguy1957 folded before Flop (didn't bet) Seat 3: ArtPijon (button) folded before Flop (didn't bet) Seat 4: Haftizin (small blind) showed [As Ah] and won (12260) with two pair, Aces and Kings Seat 5: momfight (big blind) showed [Ac 4d] and lost with a pair of Kings Seat 6: semtexcally folded before Flop (didn't bet)

Does anyone have any thoughts on me going all-in in this situation (aside from the fact that its a horrible play)?