1961, Directed by Poul Bang and Sidney W. Pink

Some decidedly dodgy special effects on display in this monster movie. The green acid-spit / fire effect from the monster is appalling - at least they convinced some real people to ride their bicycles off a bridge.

Watch the trailer again, and keep an eye on the guy’s hair at 54 seconds in. When he receives bad news it almost flies off the top of his head.

Spolier! They appear to show the monster dying halfway through. Didn’t that ruin the ending of the full movie for everyone…?

Favourite bit: The shocked look on the face of the scientist with the glasses - I think we can assume that acting wasn’t his main job.

IMDB LINK