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Bodog BB is $.50

Hero (BTN) ($50)
Villain (UTG +1) ($70)

Preflop: dealt to Hero
1 fold Villain calls, 1 fold, Hero raises to $2.25, 2 folds, Villain calls $1.75

Flop ($5.25)
Villain checks, Hero bets $2.50, Villain raises to $67.75 all in, Hero?