Some kids in the U.K. pranked their grandmother by making it seem like her favorite soccer team scored. She was in the other room on the phone, so they started cheering like something big happened.
Then she runs in, sees that nothing happened, and UNLOADS on them with a string of profanities.
(Search for "Pretending to Grandma That City Scored at the Start of the Match." WARNING: Profanity, including the F-word.)