You've probably seen this prank before with the water bottle and the penny. Well if you haven't basically you put a penny under an open bottle of water . . . toss a towel on it . . . and say you're going to make the penny go through the bottom of the bottle, and end up inside.
Well the whole "trick" is actually just a prank to pull on someone. When they walk over and look into the bottle BOOM!! That's when the person doing the trick squeezes the bottle and all of the water from in the bottle explodes all over their face!
There are literally hundreds of videos online of people doing it. But this might be the funniest one. An older lady in Indiana recently did it to her husband. And the best part is how hard they both laugh.