Holy cow, I never thought you could do this, especially with modern cars and car security systems. This little trick uses nothing but a tennis ball with a hole punched on it. Here’s how it’s supposed to work. I just hope cars don’t get jacked using this method. No more slim jims, huh?

• Punch a hole on one side of a tennis ball using a hot nail or screwdriver. This way, it becomes a small tough pump.
• Place the whole on the keyhole.
• Push on the tennis ball.
• The air pressure will cause the lock tab to pop up.

Sure you can do this. But wouldn’t it be more practical to just carry a spare instead of a tennis ball? And wouldn’t this damage parts of the locking mechanism. Oh well, your call. For extreme emergencies, I guess.

Via Lifehacker