Prank calls work for some shows, but are out of character for others. If it doesn’t fit your nature, you could make one of your cast members the victim with Prank The Host.
For Kidd Kraddick, prank calls did not fit his good-guy personality profile, but he figured out how to have fun by making his own form of Kidd Kraddick Prank Calls.
Check this out, and see if Kidd’s formula inspires a great variation that could work for you.
