You can watch an ASCII version of the full Star Wars Episode IV movie right in the Command Prompt window!
Just open Command Prompt and execute telnet towel.blinkenlights.nl. The movie will start immediately. This isn't a terribly productive use of the Command Prompt, nor is it really a trick of the Command Prompt or any command, but it sure is fun!
Note: The telnet command is not enabled by default in Windows 7 or Windows Vista but can be turned on by enabling Telnet Client from Windows Features in the Programs and Features applet in Control Panel. If you'd rather not enable Telnet but would like to see the movie, you can also watch it in your browser here.
