What's your most "Which idiot did that?! Oh, it was me..." moment you've experienced?

[lrobert142]

Personal story

Wrote some backend, database-interaction code
Found a bug that would cause cascading deletes instead of just deleting a single record
Did some research and found it was because a parameter was missing from a function
Parameter was clearly documented
Went on a quiet rant like, "This is clearly documented, which idiot would do something so silly?"
git blame
My name comes up for "last edited"
"Oh... what an interesting solution to that problem"
Quietly fix the problem and feel like a nonce