villain seems bad over 12 hands, first time he's donked
flop standard with backdoors? turn standard?

PokerStars No-Limit Hold'em, $0.50 BB (7 handed) - PokerStars Converter Tool from FlopTurnRiver.com

MP2 ($66.05)
Hero (CO) ($61.85)
Button ($50)
SB ($34.80)
BB ($36.95)
UTG ($50)
MP1 ($20)

Preflop: Hero is CO with J, K
3 folds, Hero bets $1.50, 2 folds, BB calls $1

Flop: ($3.25) 6, A, 5 (2 players)
BB bets $1, Hero calls $1

Turn: ($5.25) Q (2 players)
BB checks, Hero bets $3.50