So method one, the magician starts with the birthday boy and moves clockwise, passing out 100 pieces of paper numbered one through 100. He cycles around the circle until all the pieces are distributed. He then uses a random number generator to pick an integer one through 100 and chooses the volunteer with that number. So let's just think about what's happening. So there's 15 kids in a circle. So there's one, two, three, four, five, six, seven, eight, nine, 10, 11, 12, 13, 14, 15. I planned that out amazingly well.