Just don't go to take off your left crank arm while listening to music and talking to friends, put the crank puller on, twist it really hard, strip it's threads and the crank arm threads because you weren't paying attention and forgot to take off the allen >.>
Yeah I did that two days ago, stupid distractions ruined my tool and my crank arm is most likely stuck on for good now. Anyone know if i can use a tap to rethread it?