I opened the www.justice.cz webpage in my firefox browser and not only it didn't open, but all my actual downloads stopped and when I tried to type something into the adress bar, the strange thing on the video happened.
An easy way to create (safe) wanna-be-bomb made of baking powder :) I had quite fun with it when I was a kid.
This video reveals an "easter egg" in MS Word. Tested in MS Office 2003.
Polar bear with a lot of free time :) This video is really short, but the bear kept doing this special move for more than an hour... or maybe he's still doing it even now :)
Learn how to make a paper cup you can really drink from!