Things to do when you're alone in the office:

1. Pick your nose and wipe it under somebody else's desk.
2. Check out your friends' Browser History and then turn off their PCs.
3. Print personal documents. A whole lot of'em.
4. Talk very loudly to yourself. Better if you sing songs from Slipknot.
5. Run around until you sweat excessively.

Whatever you do, do NOT do explicit stuff. Or even think of surfing it. If you get caught, it'll cost you a fortune to do a plastic surgery and move out of the country.

Out of humiliation, I mean.