Run one lap around the office at top speed. Walk sideways to the photocopier.

Find the vacuum and start vacuuming around your desk.

When they're not looking, pour most of someone's fresh cup of coffee into your mug leaving them with an inch of brew.

Ignore the first five people who say 'good morning' to you.

Phone someone in the office you barely know, leave your name and say "Just called to say I can't talk right now. Bye."

To signal the end of a conversation, clamp your hands over your ears and grimace.

While riding an elevator, gasp dramatically every time the doors open.

THREE-POINTS

Babble incoherently at a fellow employee then ask "Did you get all that, I don't want to have to repeat it." - Double points if you do this to a manager.

Kneel in front of the water cooler and drink directly from the nozzle.

Shout random numbers while someone is counting.

FIVE POINTS

At the end of a meeting, suggest that, for once, it would be nice to conclude with the singing of the national anthem (extra points if you actually launch into it yourself).

Walk into a very busy person's office and while they watch you with growing irritation, turn the light switch on/off 10 times.

For an hour, refer to everyone you speak to as 'Bob'.

Announce to everyone in a meeting that you "really have to go do number two".

After every sentence, say 'mon' in a really bad Jamaican accent. As in, "the report's on your desk, mon". Keep this up for one hour.

While an office mate is out, move their chair into the elevator.

In a meeting or crowded situation, slap your forehead repeatedly and mutter, "Shut up, all of you just shut up!"

In a colleague's diary, write in 10 am: "See how I look in tights".

Carry your laptop over to your colleague and ask "You wanna trade?"

Repeat the following conversation 10 times to the same person: "Do you hear that?" "What?" "Never mind, it's gone now"

Come to work in army fatigues and when asked why, say, "I can't talk about it"

Speak with an accent (French, German, Porky Pig, etc.) during a very important conference call.

Tuck one pant leg into your sock and when queried, answer, "not now" and walk away.