Brian and Sarah are making life miserable for the other students with their constant kidding, everything from switched homework to joy buzzers. Carefree Brian and Sarah apologize with a flippant, "Just kidding," but their jokes are fast becoming not funny. Their science teacher, Mrs. Keller, arranges a little sting operation. It's a beautiful plan created by a master, but little does anyone know the final practical joke is Mrs. Keller's alone! Three self-contained sections of optional dialogue among the class president contenders (the Nerd, the Babe, and the Winner), along with accompanying reporters and admirers, add 10 or more characters and unlimited laughs. Special T-shirts available with "Just Kidding" on the back are available to end the show.