'Venus? The planet Venus?'
This movie just cracks me up. There are so many funny moments and lines. Along with the great "Fascinating. Horrible, but fascinating", I love the above line when the reporters are told that the creature is from Venus and two of them ask, "Venus? The planet Venus?". If this were redone, a la the Airplane! remake of Zero Hour!, you know the next line from the reporter would have to be "Are you sure you don't mean 'Venice'?". Or how about Dr. Sharman ("Just make sure you don't squeeze him"). The lines for a Abrahams/Zucker or MST3K remake write themselves.
You know it's going to be that kind of a movie when right at the beginning, the guy who plays the Italian fisherman Verrico (couldn't they have found someone with more acne scars?) has lines like, "Look...a hole...". I'm talking about Ed Wood level touches like a reporter who has to lounge back on a desk when talking to his editor on the telephone.
What really makes this movie stand out against other MST3K-type movies are the A-grade (for the time), Harryhausen special effects. It turns 20 Million Miles to Earth into a kind of forerunner of movies like Ghostbusters that combine decent special effects with (in this case, unintentional) comedy.