Full Tilt Poker $3 $0.30 Knockout No Limit Hold'em Tournament – t3000/t6000 Blinds + t750 – 8 players

I'm never sure what to do in this spot….. UTG was a “23/5” over 150 hands so we can sort of discount that he has a pretty big hand preflop since he only seems to raise monsters. I remember thinking with 17bb's I should shove here and pick up a pretty decent sized pot (1/5th of my stack) but I always have that lingering “he's limping ACES” thought that goes through my head and I end up chickening out and folding…Is shoving 17bb's bad here? what about raising to isolate the limper instead? Is the fold that bad?

TournamentPokerEdge.com Hand History Converter

Traian Munteanu (SB): BB = 46.7, t280095

banderson4444 (BB): BB = 18.1, t108551

thjang72 (UTG): BB = 43.3, t259550

Ontilt20 (UTG+1): BB = 14.0, t84297

exomoulianitis (MP1): BB = 23.1, t138808

SPARROW_JACK20 (MP2): BB = 10.5, t63226

Metasploit (CO): BB = 17.4, t104284

caperusita (BTN): BB = 49.0, t293770

Pre Flop: (t15000) Metasploit is CO with Q K

thjang72 calls t6000, 6 folds, banderson4444 checks

Flop: (t21000) T 4 A (2 players)

banderson4444 checks, thjang72 bets t12000, banderson4444 folds