Scrawny, but good-natured Vernon(PAT CARDI, in a memorable performance) is a science-minded high school nerd, and an unassuming human target for cruelty who's belittled and abused by nearly everyone he knows(moronic jock schoolmates, choleric teachers, the psycho janitor, etc.). He concocts and ingests a substance which renders him a Jeckyll/Hyde type beast, the more powerful and assertive(and certainly more dangerous)persona emerging sporadically to become the "normal" Vernon's savage avenger. A sharp and suspicious investigator has his eye on Vernon, as does the school beauty queen(because the prettiest girl in school is always in love with the skinny, picked-on science geek. She knows he's gonna be rich some day...)
This bouncy little Crown International Pictures wonder was a perennial staple on late-night creature feature shows during the 70s and 80s, and those of a certain bracket remember it fondly. Folks today should get a kick out of its funky retro panache, and they may be surprised by the potent violence in some scenes(nicely punctuated by jarring heavy-reverb guitar thrums).
An all time great...of sorts. 7/10.