For playing this practical joke on anyone you'll only need a small hammer and a plain piece of glass (another safer option is a portable stereoplayer with a middle-power dynamic and some plain glass shards), plus courage
All you'll need to do is to arrange an intentionally broken glass incident for any of your friends or colleagues owning a car. First you should come up to his/her car together, then distract his/her attention, pull out hammer and a piece of glass and break it loudly in such a way so your "victim" assumes that you've broken a glass of his/her car. If you don't want to risk wounding your hands with the glass shards you can prepare them beforehand and then just scatter them, at the same time turning a breaking glass sound sample on you stereosystem (you can even use your victim's car audio system for making this noise!).
After hearing this noise your victim would turn to his/her car and see an unexpected picture, you standing near it calmly holding a