My cousin did this to me last year. He rolled random amounts of money then put them all it to separate bags. At first he brought them to me one by one but later he brought in at least 20 more bags making me count all the money up in the end. It was funny and fun for everyone to watch yet just a little annoying for the victim. Now I'm looking for a prank to do on him that's even better. ;) Wish me luck!