Here's something fun to do if you work at a terminal which runs under the UNIX operating system:
(1) Create (or modify) the file in your main directory called .logout to say "cat warning."
(2) Copy the following information into a new file called "warning."
Now this message will appear on your terminal every time you log out:
THIS TERMINAL HAS BEEN DETERMINED TO BE ELECTRICALLY UNSAFE BY THE PRIME COMPUTER AT REG@NS4XDQ. THERE IS A DANGEROUS VOLTAGE LEVEL PRESENT IN THE KEYBOARD. THE PROPER TECHNICAL STAFF HAVE BEEN NOTIFIED. FOR YOUR OWN SAFETY PLEASE REMAIN AT LEAST THREE FEET FROM THE KEYBOARD.