Single my whole life, never really had one, trichotillamania, cracking my knuckles, and bouncing my leg, and when my roommate just kept tapping his fingers on the table, even after I asked him to stop.
Have not really had any, but the best thing I can think of would be getting bitten in the face by an ostrich at The Wilds in Ohio, without a medical kit. Makes sense, as it was in Ohio