Start -> Run -> then type: telnet towel.blinkenlights.nl
I about crapped my pants when I saw it, then I just started to laugh my ass off. All I am going to say is that someone has way too much free time on there hands.
That is all, you can now go back to sufing the web for what ever you want.
PS: If you dont happen to be on a windows computer, or do not have access to a telnet client on the computer you are on, you can goto this website (http://www.asciimation.co.nz) to see the same thing, but it just somehow is not the same outside of telnet.