*WARNING* although it is very hard to actually hurt yourself doing this, it IS possible. Be warned. I take no responsiblity for what you do with this knowledge.
What you need:
1. Two hands, only got one? sorry I cant help you.
2. A Bic lighter. You can get one for 25cents at a gas station.
ready? Go on to the next step.
Step 1: The correct hand position.
Got it? Ok, on to the next step!