I had this happen _several times_ at an agency I used to work at. I stumbled across some really bad code in their main product, got irate and asked "who wrote this shit?". Ran git blame and discovered it was me. Ok, but this is still s#*t, I need to fix it. Spent a couple of hours and found no way of improving it, figured "well, it's ugly, but I guess it is what it is" and moved on.

A few months later I came across the same chunk of code... "Who wrote this shit?", and off we go again. I must have gone through this loop 4 or 5 times with the same piece of code.

If you want to take that to the next level, accidently address an email to yourself and then complain that the "response" is all but helpful.

I mean... that could happen... hypothetically... to... someone.

More than once I've googled how to do something new and found the answer on Stackoverflow, written by me. I haven't even written that many answers on Stackoverflow.

It sometimes can be misleading. If I'm refactoring large parts of code (e.g. splitting a large file to smaller ones), then sometimes the original logic written by someone else will be left, but git blame will show me because I was the last to make changes