Inform everyone you meet of your personal Kennedy assasination/UFO/ OJ Simpson conspiracy theories.

Repeat the following conversation a dozen times: "Do you hear that?" "What?" "Never mind, it's gone now."

Light road flares on a birthday cake.

Wander around the restaurant, asking other diners for their parsley.

Leave tips in Bolivian currency.

Demand that everyone address you as "Conquistador".

Push all the flat Lego pieces together tightly.

At the laundromat, use one dryer for each of your socks.

When Christmas carolling, sing "Jingle Bells, Batman smells" until physically restrained.

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.

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".

Sculpt your hedges into anatomically suggestive shapes.

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 that people pronounce each A.

Sit in your front yard pointing a hair dryer at passing cars to see if they slow down.

Chew on pens that you've borrowed.

Invent nonsense computer jargon in conversations, and see if people play along to avoid the appearance of ignorance.