Click on this link and you will see a man. Put the cursor of your mouse...

[whistle]

... on his nose and leave it there and see what happens... bizarre. How do they do it?

Click here: http://fun.from.berdyczow.org/2004-05-26/posmeraj-goscia-w-nos.swf

[TimeChaser]

1. ... I don't trust this

Is something going to jump out and give me a heart attack?

[ThomCat]

2. It's not one of those scary videos.

It's just an amusing video that is triggered by a mouse-over. :)

[whistle]

6. No, it is not a scary video

[Drum]

3. Neato!

That's fun...go ahead and trust it.
Nice find, whistle.

[whistle]

7. Thank you, I thought it was clever

[Hong Kong Cavalier]

4. That was pretty clever.

I think I know how they did it, but it's clever all the same.

[ZombieNixon]

5. Fairly simply, actually.

A still image turns to a video when a "play video" command is triggered by the mouse being in a certain portion of the screen. At the right point in the video, a "hide cursor" command is called and then called again during each loop to make sure it stays hidden until the end of the video.

But even though I know how it works, it's still funny. :D