This was an ugly play by my opponent. Beautiful flop though...I had to count it twice to make sure.

Ultimate Bet No-Limit Hold'em, $2 BB (10 handed)

UTG ($104.25)
UTG+1 ($135.40)
UTG+2 ($384.05)
MP1 ($93)
MP2 ($93.90)
MP3 ($185)
CO ($175.50)
Button ($108.35)
SB ($105.20)
kennyg ($163.30)

Preflop: kennyg is BB with , .
UTG raises to $7, 8 folds, kennyg calls $5.

Flop: ($15) , , (2 players)
kennyg checks, UTG bets $10, kennyg calls $10.

Turn: ($35) (2 players)
kennyg checks, UTG bets $8, kennyg calls $8.

River: ($51) (2 players)
kennyg bets $32, UTG calls $32.

Final Pot: $115

Results in white below:
kennyg has 5s 3s (straight, seven high).
UTG has Ah Ks (one pair, aces).
Outcome: kennyg wins $115.

The three on the turn killed your action, if the A hits on the turn you may get his whole stack.

Yeah the 3 on the turn made me bet out that river. That's a play I don't often do.