The other day someone was discussing the story of a guy that emailed his entry to a contemporary art contest, but forgot to attach the file. He cursed his stupidity for weeks after he realised his mistake, so he was very surprised when they told him he won the $100,000 prize.
The story is actually apocryphal, the one who brought it up was quoting an Onion-style fake news website without realising it, but that hardly seems to matter.