when protecting the bb goes horribly wrong

jetsonsogcanfly has it right IMO. He is too aggressive. He could be 3 betting the turn with AK-A9 amongst other hands.

Folding isn't smart, that is assuming you don't have a great read on him.

I like the turn check raise. The villian is overly aggressive and, with that aggression level, is more likely to be betting his draws. Even though this situation didn't turn out well for you, long term it should do fine.

[Dazarath]

I like it so far. I don't like a fold. You don't think AT or A9 is in his given range?