As a general rule in situations like this if your going to be playing you should probably be reraising. I'm folding a good chunk of the time though and never flatting
if ur hangingon for ur life make the call, its better to go out trying than blinding out. u need to give more info, chip stacks, stage of tourney etc......
with 4 players still to act you need at least a strong ace, unless everybody is shorter than you, you can call and "gamble".
if a big stack donks his hand and overcall you, you're both out.