Make sure you could everything Exact as possible.
This prank is called the Ground Hog Prank. I've been thinking of this prank for years. One morning when someone wakes up just make shit happen. Like break something wreck a car and remember every detail. Then the next morning do the same thing, (buy new things of course). And just watch someone freakout over and over. I think you guys would be the perfect crew to pull this off!