I"m a mug who"s going busto here.
Raised preflop with KJ - what better flop could you hope for than top pair with decent kicker and a straight draw. Any decent bet here is going to commit me to the pot. Don"t want to check and give the impetus to someone else who might ask me to call for my tourney - bet the pot (or even shove it all in now [1750 into 1150 pot] as it"s all going to end up in there if I bet anyway) and put the others to a decision.
Probably a spewy way to play it, but the preflop raise with KJ out of position with these stack sizes has kind of got us into trouble (or not).
The shove may even be a value bet that gets called by hands we are beating (QJ, AK, etc). Also, we have to think an overpair would have re-raised preflop.... so the only hands that are realistically beating us here are KQ, Q8, or two pair, and even then we have outs.