A couple of years ago I saw a video of a boat, maybe a tugboat, that seemed to drift down to a bridge, then sink completely underwater and get pushed under the bridge, and then come upright again - and the smoke was still coming from the smokestacks.
Never knew whether it was real or not. With what folks do with Photoshop nowdays I hardly believe anything unless seen with my own eyes.
Found it.
https://www.youtube.com/watch?v=TYzpK3VqNXg Called Boat under bridge.