If you’re ever stuck in a car with no key, or if your car has been broken into and you can’t get the door open, there’s one option: using a tennis ball. There are a few things you need to do before trying this:

  1. Find a tennis ball that’s the right size and shape. A small tennis ball will do, while a larger one will be more effective if you need to use it as an improvised batter.
  2. Place the tennis ball on the inside of the car door handle (or on top of the handle if it’s not accessible from the outside). This will help keep your hand close to the door while you use your other hand to try and pry it open. If all else fails, just wait for someone else to come along and help!