Question post flop

[johnegolfer]

PokerStars Game #2131213622: Tournament #10210059, Hold'em No Limit - Level IV (50/100) - 2005/07/18 - 13:40:52 (ET)
Table '10210059 1' Seat #9 is the button
Seat 1: johnegolfer (1425 in chips)
Seat 4: cablepimp (1405 in chips)
Seat 5: josephabs (2125 in chips)
Seat 7: bowsider (2045 in chips)
Seat 8: cory_d22 (1090 in chips)
Seat 9: Lemongello (5410 in chips)
johnegolfer: posts small blind 50
cablepimp: posts big blind 100
*** HOLE CARDS ***
Dealt to johnegolfer [Ks Kh]
josephabs: folds
bowsider: raises 300 to 400
cory_d22: folds
Lemongello: folds
johnegolfer: raises 300 to 700
cablepimp: folds
bowsider: calls 300
*** FLOP *** [8d Jc 3d]
johnegolfer: checks
bowsider: bets 1345 and is all-in
johnegolfer: calls 725 and is all-in

*** TURN *** [8d Jc 3d] [2d]

*** RIVER *** [8d Jc 3d 2d] [4d]
*** SHOW DOWN ***

*** SUMMARY ***
Total pot 2950 | Rake 0
Board [8d Jc 3d 2d 4d]

The question is was it just bad luck that he rivered a 4, or in this position should I have pushed all-in after seeing the flop to try to take it down there?

JE