server practical joke

i run a small network with some of my friends, and was wondering if anyone had an idea for a good practical joke to play on them. its only about 20 pc's running novell. i have access to all of their files, because i have an unlimited admin account, but dont have any really great ideas to give them a scare, without causing any real damage. any ideas would be appreciated

 

Check out www.rjlsoftware.com. They have a number of funny things there like a cursor that flips you off and a window that pops up and makes you think its deleting all you files. I doesn't really do anything but sure scares some people.

 

Just change some of the icons on their desktops(preferably the most used) to open the prank program and make an evil laugh.

 

Hide the power cables.

 

If it is a windows network, running Novel, then install the BSOD screensaver.