If you wish to play a prank on your friends, feel free to make use of my idea! With its help you will give them the jitters!!!
So, are you ready to start the fun?!
Take your friends for a drive. Offer them to go to some picturesque place. Prepare beforehand an empty bottle of vodka or some other alcoholic drink and fill it with water. Place it into the glove compartment. So, you with your friends are on your way. Drive the car as slow as possible. In time your friends will start rebelling against such speed. But you just tune out. Stand their indignation or may be joking for about 10 minutes. Then suddenly brake, look around them in a mad way, mumble something like "well, you wanted it yourself...", take out the bottle, drink a half of it, and abruptly gas. Let them feel in a stew!