LineRider.....

This is some great time wasting fun!!!!

http://linerider.com

YouTube vs. Google Video vs. Revver

The idea here is that you have to press play on the following videos (in vertical order) so that they all stream to you at the same time. You may need to adjust the volume on each respective network, though. Press play on the top (YouTube) video, then immediately press play on the second (Google Video), and then press play on the third (Revver). Bam, bam, bam - and you should see ‘em playing back simultaneously.

If you press F11 with Internet Explorer, you can change to full screen mode and see all three screens...

Here's the original link...http://chris.pirillo.com/2006/11/27/youtube-vs-google-video-vs-revver/