This next tutorial is a classic prank that is easy to perform and will trick everyone around your car. It involves leaving a bag full of groceries, items, goods, whatever on top of your car and driving around with it on there.
You can do this without putting anything on there or you can find a way for this to be attached for a long time. It's an easy prank to perform and won't result in anything bad happening to your or others. Good luck!