Blink wildly and then close your eyes really tight for an interesting light show

See how long you can hold a note

Try to not think about penguins

Use your secret mind power over others

Pretend you're a robot

Scratch yourself

Rate passers by

Repeat the same word over and over until it loses its meaning

Pinch yourself

Try to swallow your tongue

Pretend to be a car

Make Star Trek door noises

Look at something for awhile, shut eyes, study after image

Get yourself as nauseated as possible

Invent a weird twitch

Make a low buzzing noise

See what's in your neighbour's rubbish/trash

Watch TV, repeat everything said in Italian accent

Send spooky emails

Play our useless games

Pretend all humans will die except for people in room with you

Step off a curb with eyes shut, imagine it's a cliff

Burn things with a magnifying glass