When you're in an emergency situation, you don't have time to think; only to act. With practice, I can throw one of these bat-boys (pun haha) together in about 13 seconds, with only a plastic fork. I have seen these on the Internet, but they cost anywhere from $15 to $45! These may be disposable, but they can sure pack a punch at a fraction of the cost.
DISCLAIMER: I AM NOT RESPONSIBLE FOR ANYTHING CATASROPHIC THAT YOU DO WITH IT. I simply gave you instructions on how to make it.