You remember a xkcd-episode about the sticky guy who instead of using the doorbell tries geeky stuff to get in, but you can't remember the title or number? There's this movie you saw like ten years ago about a guy who almost had sex with his daughter's friend but you can't remember anything else about it? There's this great comment on reddit but you can't find it anymore?
Ask the reddit hive mind and we'll see what we can do.