Bill became a household name as an SNL cast member with his amazing impersonations and original characters - most notably, Stefon. There's no doubt that he was the perfect choice for pulling this off and senior Grace Aroune used her Make-A-Wish request to get Bill on board to prank her Iroquois High School classmates in Elma, New York.
Bill worked with Grace and the school's principal, Dennis Kenney, to pull off the epic joke, with the actor pretending to be a fireman who was visiting to talk with students about fire safety.
Bill told HuffPost Live: "I was an old firefighter who went from classroom to classroom giving really bad advice and making the kids do weird drills like stop, drop, and roll."
The SNL alum was eventually recognized, but managed to pull off the prank for some time before he was figured out. Later, he gave a Stefon-style announcement over the loudspeaker, as well as signed yearbooks and autographs.
We are so jealz.