Deliberately hum songs that will remain lodged in co-workers' brains, such as "Feliz Navidad", the Archies' "Sugar" or the Mr. Rogers theme song.
While making presentations, occasionally bob your head like a parakeet.
Lie obviously about trivial things such as the time of day.
Make beeping noises when a large person backs up.
Leave your Christmas lights up and lit until September.
Change your name to John Aaaaasmith for the great glory of being first in the phone book. Claim it's a Hawaiian name, and demand hat people pronounce each A.
Sit in your front yard pointing a hair dryer at passing cars to see if they slow down.
Invent nonsense computer jargon in conversations and see if people play along to avoid the appearance of ignorance.
Wear a LOT of cologne.
Ask to "interface" with someone.
Listen to 33rpm records at 45rpm speed, and claim the faster speed is necessary because of your "superior mental processing".
Sing along at the opera.
Mow your lawn with scissors.
At a golf tournament, chant "swing-batatatatatata-suhWING-batter!"
Finish all your sentences with the words "in accordance with prophesy".
Ask the waitress for an extra seat for your "imaginary friend".
Go to a poetry recital and ask why each poem doesn't rhyme.
Ask your co-workers mysterious questions, and scribble their answers in a notebook. Mutter something about
"psychological profiles".
Incessantly recite annoying phrases, such as "sticky wicket isn't cricket."
Stare at static on the tv and claim you can see a "magic picture".
Select the same song on the jukebox fifty times.
Scuff your feet on a dry, shaggy carpet and seek out victims.
Do not add any inflection to the end of your sentences, producing awkward silences with the impression that you'll be saying more any moment.
Never make eye contact.
Never break eye contact.
Signal that a conversation is over by clamping your hands over your ears.
Construct elaborate "crop circles" in your front lawn.
Construct your own pretend "tricorder", and "scan" people with it, announcing the results.
Give a play-by-play account of a person's every action in a nasal Howard Cossell voice.
Holler random numbers while someone is counting.
Make appointments for the 31st of September.
Invite lots of people to other people's parties.
Send fifty copies of this list to everyone you know. -- Now!