[Waverunner]

A great atomic age movie, and telepathic intelligent crabs, just like you imagined them. I love the futuristic stylistic opening credits.

But "It conquered the world" with lee van cleef and peter graves is one of the scariest films I remember from the 60's drive in.
And "creature from the haunted sea" is the funniest.

[Some Fat Guy in L.A.]

I’ve never seen “It Conquered the World” but I know about it from the monologue before Frank Zappa’s “Cheepnis” song on the “Roxy and Elsewhere” album. He talks about the 2x4 that can be seen pushing the monster out of the cave.