Office pranks occur more often than you think, and sometimes, they involve duct tape, pennies, and even a room stacked to the ceiling with chairs. Thankfully, the majority of these pranks are harmless, but may cause frustration and / or despair. We’ve rounded up ten things you should never see at the office. Continue reading for more.

10. Toilet Chair

9. Sleeping on the Desk

8. Chair Disaster

7. Robot Uprising

6. Strange Signs

5. Pennies

4. Horse Mask

3. Sticking Head in Paper Shredder

2. Cardboard Furniture

1. Security Camera Prank