I fold both, in the long run the amount of times I play hero against an unknowns weird river line it's usually a losing play. At these lmits anyway.

Also, in the first hand you really shouldn't be raising these kinds of hands from the SB, you'll have the worst possible position for the rest of the hand. As played, I would bet the flop and turn bigger, if he calls both those, I feel a lot better about a river c/f.

And in the second hand I usually bet both streets a little larger. Your line's not bad though because it's an intimidating board so you might string a weak Q along, and if someone else has a jack, you basically lost the least as you're not really beating any other ones.