I`m not very good going back and forth.
Unless u have a read, I can`t see the guy folding.
His raise suggests he has something, but I think it is a brave move by you. He raised 5 times bb pre flop so what does he have?
Already an overpair to your Jacks? Lets hope if he has one of them is not a spade? AK/ AQ - again, hopefully no spade or spades. A set - he ain`t gonna fold. 1010, open straight draw, 2nd pair and possibly flush draw?
I can`t see a hand he has that he raises 5 times bb preflop then folds post flop, other than red AK, AQ, pair below 8`s.
I think folding is not out of the question - u could already be way behind - but I would not.
Calling is not, IMO, a stupid move. If he has nothing, he will be thinking the flop was good 2 u. Then see what happens after the flop.
However, a reraise of $5 would tell u a lot.
This is an interesting situation that I think there is not a bad move u can make, fold, call, reraise or push all in!!!