The Toxic Avenger, released in 1985, was the first movie made by
Troma Pictures, known for producing low budget B-movies with campy plot concepts and hilariously bad performances and plots. This particular film became an instant hit (and began a franchise of sequels.) The "plot," a term that loosely applies, is thus: Melvin, a geek who works at a health club, is thrown out the second story window by a bunch of muscle jocks. He lands into a vat of toxic waste and is transformed into an abomination of a gruesome human being; muscular, but with a hideously deformed face. He goes on to fight crime and all types of baddies, and eventually, of course, gets the girl. There are four films in the series.
All Wikipedia text
is available under the
terms of the GNU Free Documentation License