Could someone help me identify a movie I saw in my childhood from a vague scene description? The movie was on TV, I was anywhere between 8 and 11, so the era of the film would've been 1963-67ish. It was in color so I know it wasn't any older than probably 1964. I remember xylophones in the opening credits and eerie xylophone music throughout the whole film as well as skeletons. The one scene, however,that stands out the most,was a scene where a guy was running away from someone or something and it was on a crowded busy downtown street in a big city at night, the weird xylophone music in the background and the movie must've been about some kind of mind control as he was hallucinating. The Walk/Don't Walk" signs at the intersections were flashing on and off and they suddenly turned to "Don't Run", which freaked the man out.

I know that's not much of a description , but its all I can remember.

There's an older movie from my childhood that stands out as well, black and white, probably 50's, I was around 4 or 5 when I saw it. It caught my attention because it was a scene of scuba divers and I was fascinated with scuba diving at the time. The divers were confronted by a clam like monster that ate one of them and I remember a scene where one of the divers was half stuck inside the monster's mouth being eaten alive. It scared the hell out of me as a kid and I would probably get a good laugh if I could find the film and that scene on YouTube.

First movie is: The Power (1968)

Thank you! You have just satisfied a 40 plus year old search for me! All the best!

The second one sounds like The Monster that Challenged the World:
https://www.youtube.com/watch?v=YM7b0-HoTlc

Sounds like you're on the right track, though not sure. I distinctly remember a scene where a diver is half hanging out of the creature's mouth. Then again, I was probably 4 or 5 when I saw it. Thanks folks!

Hmmm that was a terrible link I posted for you, try this one, much better quality (much) - at around 6 min 30 seconds-ish, you see the diver in the creatures mouth... https://www.youtube.com/watch?v=erQ_NJDGI0A

Looks very close to it. That's probably it. Thanks. I remember it scared hell out of me as a kid.Still didn't keep me away from the water,though.

While we're on the subject of movies with water monsters, there's another one I remember (colour,I think) where some folks were out on a ship and a monstrous looking King Neptune came out of the sea. Ring a bell?

While I'm 100% sure Adolf got the first movie right and I'm about 90% sure Aliseaodo got the second movie, something is still nagging me about that. I seem to remember the diver being in a clamlike creature's mouth being chomped on FROM HIS WAIST and you could see blood floating up, but it could be jumbled up childhood memories. After all, I'm going on an almost half century year old memory.