The Amazing Colossal Man

The Amazing Colossal Man aka The Colossal Man is a 1957 blackandwhite science fiction film, directed by Bert I. Gordon and starring Glenn Langan. The film revolves around a man who grows to over 60 feet tall as the result of an atomic accident. It is an uncredited adaptation of the 1928 Homer Eon Flint short novel The Nth Man.

An early morning test explosion of the first atomic plutonium bomb is planned at a military site in Desert Rock, Nevada. When the chain reaction for the charge fails its cycle and does not detonate as expected, Lt. Col. Glenn Manning Glenn Langan receives orders to keep his men in the protective trench, as an explosion is still imminent, but its timing is now unknown. Moments later, an unidentified small civilian aircraft crashlands near the bomb site, and Glenn leaps from the trench and runs into the detonation area to rescue the pilot. Once in the detonation area, the bomb goes off, and Glenn is caught in an atomic blast that burns him and immediately disintegrates his clothes and hair.Surviving the blastbut suffering from thirddegree burns over almost his entire bodyManning is treated by specialist Dr. Paul Linstrom William Hudson and military scientist Dr. Eric Coulter Larry Thor at the base hospital. Glenns fiance Carol Forrest Cathy Downs, who was supposed to have been married to him that very night in Las Vegas, anxiously awaits a prognosis...but Linstrom refrains from telling her that the consensus is that Glenn will not survive. ........

Source: Wikipedia