[Lucky]

i dont like it, if unknown is decent, he's likely to have AA/KK and figured to mix thing up by trappping pfr since it looked to get heads up (not great play from sb, but happens). In this case your play is bad.

If unknown is bad, which seems more likely from pf and flop action, he's much more likely to call with whatever bad mid pair he has as he 'can beat your ak."

Basically, it goes back to raising one gay bet from donk a hand, then shutting down. In this hand, i think villains pf action counts as you having raised donk once, now he donks again, i shut down and fold.