When you play RPG and facing a SUPER HARD boss and somebody talk to you like it's the most important thing in the world and it has to be NOW ! .... Ok, I'll die just for you..
That's what the pause function is for. Although before you unpause it you need to somehow get your mind back into that same state of concentration that it was in before the pause, don't you ?
I suppose that is different with online games though.