A "Shock Theater" perennial since it was first released to television in the early 1960s (stretch-framed to pad out its running time), The Amazing Colossal Man is firmly in the "So Bad It's Good" category. While overseeing the atomic tests in the Nevada desert, Army colonel Glenn Langan is exposed to extensive amounts of radiation. As a result, Langan grows, and grows, and grows, at the rate of ten feet per day. This sudden height gain adversely affects the poor man's mind, and soon he's as mad as a hatter. Looking for all the world like Mr. Clean in a diaper, the Colossal Man goes on a murderous rampage, laying waste to several Las Vegas landmarks before he is killed by army bullets while standing atop the Boulder Dam. The special effects are adequate, but the dialogue is ridiculous-in fact, if we didn't know better, we'd say that the film was intended to be funny. Our favorite bit: the huge hypodermic needle.
~ Hal Erickson, All Movie Guide