Two reasonable plays here -- call or go all in. More than likely, your jacks are good here. Worring about a boat is not good poker here. The other hand that crushes you is 9t. However, with the spades on the flop, I would think the villain makes some kind of value bet on the turn, though he very well may have been check raising the hero to induce a bigger pot. Either way, with the pot of over $1000, and getting 4 to 1 on it, you cannot fold with trips. Make the best read you can on the villain and then either call or push. With no relevant info, I prob just call so I have a few chips left to work with.