. Act out your version of a company takeover.

2. Find a way to change everyone's password to "chrysanthemum".

3. Around 3:20am, play connect-the-dots with lights still on in other office buildings. Keep going until you see a small woodland creature.

4. Sneaking in the boss's desk could land you an unexpected promotion.

5. Draw stick people in all the landscape pictures on the walls, and in the morning, be the first to point out "what a terrible thing that someone did this to such beautiful works of art".

6. Go into the other gender's bathroom without fear of being caught.

7. Run up and down the hallways screaming, hoping security will come so you can have someone to talk to.

8. Leave prank messages on the CEO's voice mail.

9. Finally, a chance to live out a dream and pretend to be your boss.

10. Elevator surfing!

very good reasons

Ooh, perfect, just so happens I am doing nights tonight.