I'm not a thread creator by trade, but I figured I'd try my hand at it during the most dangerous time of the year....off season.
I had a coworker who I worked with for a few years that was incredibly annoying. For over a year, he walked around the office with a soccer yellow card and red card in his pocket, and if he felt you had done something that he deemed out of line, he would walk up to you and flash one of the cards in front of you. He even created a leaderboard at his desk. It was kind of amusing when it started, but it's got old fast. It went on for about 18 months.
He would make up songs using people's names in the office almost daily. He'd also sprinkle the pepper shaker on his tongue at lunch at eat it straight. Then one day, he just didn't show up for work again. No one knows why to this day.
I figured that I couldn't be the only one with that one person in the office who was a little strange, possibly insane, or that may even be making you go insane; so please feel free to share your wacky coworker story here. Apologies in advance if I have wasted your time. That's one thing I am very good at.