the question may be how long in the tourny do you want to survive and are you near itm one thing i find people not doing is folding when they know the board doesnt agree with the pocket pair they are holding if you have to spent chips to chase your hand then most times you should fold and not call the bets that are being throw around chances are he's not bluffing and u lose chips and the chance that u hit ur trips on the turn or river means he has had the same chances to hit his str or flush which usally hit on the river out of no where best bet is to fold then to chase in my opinion