2/4 HU call down?

[Storm of Fear]

This is what I think,

Based on what you told us, he is very Passive OOP. He also does not 3 bet often. He most likely has a very strong hand here on flop and pre flop. This is why: since he is passive OOP and doesn't 3 bet often, my thoughts are that he has had strong hands pre flop and plays flop as fit or fold. Turn brings a lot of possibilities, but I believe he has it on the flop, I could see him flipping over KKK or 333, might have gotten lucky with turn after floating flop.

As far as your turn play, I think it was okay, ONlY if you called his c/r with expectations to re evaluate river.

As played, Fold river. Turn play was good. What was river?