3bet by bad player BvB flop analysis?

Peoples behavior isn't 100% static, someone can on the whole have passive calling tendencies and still be capable of 3bet bluffing a wide range.

I'm pretty sure he was trying to adjust and play back at the time i had an active table image.

Edit - When i raised his blind i was expecting to get flatted like 90% of the time then 3bet the rest. I never expected him to fold IP BvB when he was playing so many pots and calling everyone down.