Alright, this one's for all the delinquents out there getting bored at home. There's a thing on each wheel of a car called a valve stem, which can be removed by a $4 tool called a valve grabber. You just unscrew the top of the air pump hole, put the grabber in, and yank. This will cause a loud hissing sound as air pours out of the tire. Most people do not know what a valve stem is and so when they see a flat tire they will usually shell out $20-40 for a new tire instead of a $3 valve stem. Have fun!