Wear a cape that says "Magnificent One".

As much as possible, skip rather than walk.

Stand over someone's shoulder, mumbling, as they read.

Finish the 99 bottles of beer song.

Sing the "This is the song that never ends..." song. (Ya know, Lamb Chops?)

Leave your turn signal on for fifty miles.

Pretend your mouse is a CB radio, and talk to it.

Try playing the William Tell Overture by tapping on the bottom of your chin. When nearly done, announce "no, wait, I messed it up", and repeat.

Drive half a block.

Name your dog "Dog".

Inform others that they exist only in your imagination.

Ask people what gender they are.

Reply to everything someone says with "that's what YOU think."

Lick the filling out of all the Oreos, and place the cookie parts back in the tray.

Cultivate a Norwegian accent. If Norwegian, affect a Southern Drawl.

Forget the punchline to a long joke, but assure the listener it was a "real hoot".

Routinely handcuff yourself to furniture, informing the curious that you don't want to fall off "in case the big one comes".

Follow a few paces behind someone, spraying everything they touch with a can of Lysol.

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."