So you are saying to yourself ... "I have too much time on my hands and I need to piss away some time doing something totally brainless and stupid". I have the answer for you. The answer is called LineRider. Whoever built this thing has started something huge. I can't call this a game since there is no winning or losing going on. This is just a pure waste of time. You basically just draw a line on the screen and a bobsled follows the line. You can do tricks and crap if you want. Some people are seriously into this and trade SOL files (a container file of all the crap you draw) or do ping pong. That's where one person draws something and then passes it to the next person that then draws some more crap. There is a whole site dedicated to just drawing for this crafty little time waster. It really helps if you have a wacom tablet since drawing those friggin loops is tarded with a mouse.
Check out the official spot of LineRider and waste an hour or so.
Lot's of videos of the stuff that they built for LineRider on YouTube. Here is an example: