One of the funniest movies I've ever seen ...

Except I don't think it was supposed to be a comedy.

Yeah, Surgio Leone took liberties with the American "old" west. But good grief! No WWII sub had a air-lock -- wouldn't work with a vessel pressurized to surface pressure. Boy I sure feel sorry for the guys who came from the "Oil Tank Repair" I hear the bends is a horrible way to go. Coors was lucky to get conked on the head.

Scuba? In 1940 whatever. Granted the first aqua-lung was made in 1943. There was one and it was destroyed by shelling France. I'm guessing those guys swimming round' their civies a hundred feet below the surface would have died of hypothermia in about 5 minutes.

I also found the use of the underwater search light by the German sub hunter, um, improbable.

They should have had Robbie the Robot do a cameo as Eddie the ship board computer.

The hydrogen explosion is the best. A depth charge within a hundred or so feet will kill a sub. So several thousand cubic feet of hydrogen do what? burn the pain a little? OK.

This could have been a good suspense flick. If you set a drama in a historical setting um, use the historical setting. It would have been much more enjoyable if they had even thought of historical accuracy. It's more fun to play the game by the rules.