How's this for a practical joke: put a partially-full 2 liter of soda in the freezer for a few minutes until it's partially frozen. The tricky part is it can't be frozen all the way through, but it needs to be frozen enough so there's a plug of ice in the neck of the bottle. And, that ice plug has to be frozen enough so no liquid can get through.

Your thirsty victim will try to suck out some soda without luck. So, he'll try shaking the bottle a little bit, or maybe warming the neck of the bottle. None of that will work.

Then, the fun will start! While the victim continues trying to drink some soda, the ice plug will suddenly fly out of the bottle. Soda will go everywhere: over the refrigerator, on the counter top, all over the floor, even covering the walls several feet away. The stunned victim will momentarily wonder what happened before setting to work cleaning up the mess.

What fun!