[ZenGum]

I have some submarine questions to throw out here, and none of them involve a treadmill.

When submarines dive in the movies, the hull makes groaning sounds as the pressure builds up. Do they really do that, or is that just Hollywood being dramatic?

In movies, we often see a submarine hiding below while a destroyer lobs depth charges at it. Why can't submarines strike back? They could push mines out through the torpedo tubes which would float to the surface and endanger the destroyer. There could even be a special vertical launch torpedo they could fire. Why not, huh?