(a cult classic) When a hobo says he's an alien, don't go pressing his buttons blindly!
https://youtu.be/EYHv8eJrW2Y?t=209 (has English subtitles)
Swamps are perfect preservatives for tanks (many timed links because that video is too lengthy):
I don't envy that diver https://youtu.be/IG3jYYvTXNc?t=765
It emerges, upside down https://youtu.be/IG3jYYvTXNc?t=1668
Loads and loads of live ammunition https://youtu.be/IG3jYYvTXNc?t=1844
Turret turning mechanism in working condition https://youtu.be/IG3jYYvTXNc?t=2277
Tracks in working condition https://youtu.be/IG3jYYvTXNc?t=2465
This machine named "Brave one" had sunk in that swamp and got preserved for posterity. Its crew got assigned to another one and perished a month later.
I wish we'd make any weirdo shit imaginable but never war.
To think of it, my existence is such a fluke, I would be butterflied away if you so much as breathe in the direction of time travel: you see, my grandmother met my grandfather by accident in a hospital, after his head was grazed by a bullet.