Villain is 17/13/3. He insta-pushed river.

Party Poker
No Limit Holdem Ring game
Blinds: $2/$4
6 players
Converter

Stack sizes:
UTG: $791.64
UTG+1: $49.80
Hero: $1072.70
Button: $684.30
SB: $396
BB: $398

Pre-flop: (6 players) Hero is CO with A K
UTG folds, UTG+1 raises to $8, Hero raises to $30, Button calls, 3 folds.

Flop: A 3 8 ($74, 2 players)
Hero bets $50, Button calls.

Turn: 5 ($174, 2 players)
Hero checks, Button bets $100, Hero calls.

River: 3 ($374, 2 players)
Hero bets $200, Button raises all-in $504.3, Hero folds.
Uncalled bets: $504.3 returned to Button.

Results:
Final pot: $574