WTF?

He has $5 left by his raise. He gave himself tremendous odds to call down any pair / any Ace....

Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 9 players
The Official DeucesCracked.com Hand History Converter

UTG+1: $21.40
UTG+2: $15.75
MP1: $65.50
MP2: $66.75
Hero (CO): $58.60
BTN: $27.70
SB: $42.20
BB: $30.00
UTG: $99.65

Pre Flop: ($0.75) Hero is CO with 8s 8d
2 folds, UTG+2 raises to $1.50, 2 folds, Hero calls $1.50, 1 fold, SB calls $1.25, BB calls $1

Flop: ($6.00) Jh 9d 7s (4 players)
SB checks, BB bets $3, UTG+2 folds, Hero calls $3, SB folds
HU with BB; he has ~$26 left at this point.

Turn: ($12.00) Td (2 players)
BB bets $5.50, Hero raises to $12, BB raises to $20.50, Hero raises to $29, BB folds
??? You have $5 left behind & you fold to the raise? WTF?!?!?!?

Final Pot: $53.00
Hero wins $50.35
(Rake: $2.65)