The Human Fly
Wikisimpsons - The Simpsons Wiki
The Human Fly is an attention seeker who climbs skyscrapers. When The Be Sharps reunite and sing "Baby on Board" on top of Moe's Tavern, a crowd flocks around to watch while at the same time the Human Fly climbs a nearby skyscraper.
 Simpsons Comics
The Human Fly makes an appearance in Bart Simpson Comic #3, in the strip, "Sky High Bart". When Bart's flying boots go out of control and send him flying upwards, he zooms past the human fly. Yet again he is climbing a skyscraper, and his line is: "Sheesh! Why not use the elevator, kid?". The Human Fly is also included on the popular Simpsons Cast Poster.