This game doesn't play like a typical 1/2 game. It plays more like a 5/5. Preflop raises are minimum 8xBB.

$450 effective stacks

Villain is a maniac whenever he decides to play a hand. His raises preflop are minimum $25-30. He has shown a wide range of hands when he has raised. If he thinks you're weak, he has no problem throwing out massive overbets. (And in these cases, he's holding air, or the nuts)

Hero is dealt Ac Jd in BB. 5 limpers, SB (villain) completes, Hero checks.

Flop: As Ad 6s Pot: $14

Villain checks, Hero bets $11, UTG calls, 4 folds, Villain raises to $60, Hero calls $49, UTG folds.

Turn: 8h Pot: $145

Villain checks, Hero bets $80, Villain raises to $280, Hero calls.

River: 9h Pot: $705

Villain checks, Hero checks.