Guy I used to work with had his bank cards in his wallet in alphabetical order, out on the pop one night his wife took his wallet, re-arranged his cards and hid one. He ran off to the corner of the pub and sulked once she eventually gave him his wallet back, and then threw his teddies when he couldn't find the missing card.
We never realised his OCD was so bad until that night, so next day we went into the office and rearranged all of his books and then sat and waited to see how long it was until he tidied them back up - he lasted 3-days
