"Top 10 April Fools' work pranks"

According to CNN, here are some of the Top 10 April Fools' Work Pranks:

1. Placed a pair of pants and shoes inside the only toilet stall in a men's room to make it appear someone was using the stall. It sat there for hours until someone called security to check if the person had died.
3. All the women in office individually spoke to the president, confiding that she is pregnant. By noon, he 'knew' that all of his female workers were pregnant and he could not tell anyone because each asked for confidentially.
5. Filled the vending soda machine with cans of beer.
6. Rigged the boss' chair to drop suddenly during a staff meeting.
7. Placed a sign on the restroom door that read, "The company ran out of toilet tissue; please use your own resources."
9. Shrink-wrapped everything in a co-worker's cubicle.

Here is the entire list.

So have you pulled or been subject to one of these pranks?