The first hand is bad because when you are re-raised, he's either bluffing or has your hand - top pair weak kicker on a paired board - beat. Very occasionally he could have a hand like 97 here but by and large, any raise means you're toast. Personally I would either call and check/fold the turn, or even fold the flop - this is weak but I really don't want to be facing an aggressive player with such a weak hand on a dangerous board.

Second hand is fine, and plays itself. It's dangerous but you have hidden trips - I think it's fine to go all in with this.