BB is usually loose/passive, but i've seen him pull an all in double barrel semi bluff before.

Ultimate Bet No-Limit Hold'em, $4 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($424.10)
Button ($376)
SB ($629.65)
BB ($208.70)
Hero ($411.90)

Preflop: Hero is UTG with 8, J.
Hero raises to $14, 2 folds, SB calls $12, BB calls $10.

Flop: ($42) 6, 7, 8 (3 players)
SB checks, BB checks, Hero bets $32, SB folds, BB calls $32.

Turn: ($106) 2 (2 players)
BB checks, Hero...

BB just has $163 left. i bet, but wasnt sure of the amount, and if i want to call a c/r.