I have a friend who was convinced someone was stealing their pencil lead (I was). So I put things like "pencil, mechanic pencil, pencil lead..." at the bottom of emails in white text so that google/bots would target their ads to be about mechanical pencil lead. He freaked out thinking it was some conspiracy to get him to buy lead Source
You know those 6 button combination door locks? I used to press one every time I walked by my boss' office. Every time he tried to get in it would take 2 attempts. Every time I tried to get in it took one, because I knew there was a button pressed. He has me change the lock, twice, and never figured out what was going on Source
I have a pretty good memory when it comes to stories that my friends have told me, so I like to retell their own story to them a year or two later (now starring myself) and see how long it takes for them to catch on. They start off with a look of "oh man, I can tell a similar story as soon as he ends his!" Then it turns into a look of "Wait, that's my f------- story!" Source
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