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.
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Step 1: Get and Assemble the Stuff
All you need is a plastic fork.
First, take the two inner tines and break them off.
Then, break the handle off at the neck, and voila! you have an emergency Batman in case you run into trouble.