But... but... you've only got 99 mate??

PokerStars - $0.10 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 104 BB
Hero (SB): 100 BB
BB: 34 BB
UTG: 387 BB
MP: 182 BB
CO: 100 BB

Hero posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has 9♠ 9♥

fold, fold, fold, BTN raises to 3 BB, Hero raises to 12 BB, fold, BTN calls 6 BB

Flop: (22 BB, 2 players) T♠ 6♠ 3♥
Hero bets 7 BB, BTN calls 6 BB

Turn: (35 BB, 2 players) 5♣
Hero checks, BTN bets 24 BB, Hero raises to 85 BB and is all-in