Programming bugs that you've turned into features

invalid@example.com (Snowy), Snowy
Wed, 05 May 2021 19:07:34 +0000

Sometimes you encounter bugs that aren't intentional, but you find a good use out of them or keep them. Are there any that you've encountered when you've created a game, and how have you made use out of it?

Personally, my favorites from dabbling with Adobe Flash are:
- Moonwalking (Explanation: typically this is the result when you have a switch-case statement for detecting key presses, but you don't check when two button presses are held down simultaneously; so then if you have two keys...

Programming bugs that you've turned into features