For a while our upstairs sub-panel looked like this
[Say "Hello" to Cthulhu]
No, really, it did!
[In-progress: Crazy wire stuff going on]
Maybe it's not green and it wasn't slimy but it sure did look like there was an elder demon or at least a confused octopus hiding in our wall.
After a while things started to normalize and look more like what you'd expect to find in a house. The drywall has been repaired and all that's left to do is to knock out some knock-down texture to match the rest of the wall and to paint it.