Name some glitches you've seen in classic Doom games or WADs

[Havok]

Whether it's a glitch or not as long as it looks like a glitch. Show a screenshot if possible.

Edited February 1, 2023 by Havok

[dasho]

https://www.doomworld.com/search/?&q=glitch&search_and_or=and&sortby=relevancy

[Redneckerz]

2 hours ago, Havok said:

Whether it's a glitch or not as long as it looks like a glitch. Show a screenshot if possible.

There you go.

[thelamp]

 

[Death Egg]

This wad looks and sounds broken in the latest ZDoom