In that type of situation I probably would call an all-in bet because he could have the Jack or he could be betting with another pocket pair like Kings or Queens and lets be honest about it would it be profitable if he chose to shove all-in with the case Jack and chase everyone off the pot?
I would certainly check if I had 4 of a kind hoping for some other player to lead out on it and hope to win with pocket pairs.
Risking everything in a game is different from risking your entire
bankroll on a single game. I had a friend once who told me he had lost his entire bankroll on one game and I told him he was crazy risking everything on one game, I had over $150 in my bankroll and he said he would use that to buy into 3 X $50 games and go for it or go Broke! and I replied but that is why I have $150 and you have nothing.
Never use more than 1% of your bankroll to buy into any game, Cash or Tourney, If you do you are heading for a meltdown and losing the lot.
Patience and Persistence Pays Off. Use your bankroll cautiously and you will in the long run reap the rewards.
When the fun Stops, STOP!