Some college-age guys pull a fast one on their friend. They TIVO the winning lottery numbers announcement from the week before. They then buy a lottery ticket for the next drawing with those old winning numbers. On the day of the drawing, they tell a friend (the "victim") to come over, and — oh, yeah — buy a couple of lottery tickets on the way. When the victim arrives, they surruptitiously switch their ticket with one of the victim’s tickets that he just bought.
Then they all sit down to watch the "winning lottery numbers" being announced "live".