In recent years, many have tried using a tennis ball to enter their locked car. With this trick, you take a tennis ball and punch a key sized hole in one side of it. You then place it up against the keyhole on the car door and hit it as hard as you can. Supposedly, this creates a rush of air that can unlock the door. While this trick may work with some older cars, most vehicles these days are so high tech that it will not work.

Don't Use a Ruler- This is basically the same as the hanger trick, only a ruler is used. If you use a wooden or plastic ruler, it may break off in the door. Steel rulers, however may cause damage to the window seal and the window. No matter what the ruler is made of, this trick for unlocking a car door is not recommended.

You may also want to keep in mind, that although 開鎖 these tricks are often talked about, does anyone really carry a tennis ball, wire hanger, or ruler around with them? It's not very likely. In the time it takes to locate a store that can supply you with one of the items mentioned above, you could already have help on the way.