Scrolling MC(?) clip?

[Macro-design]

Hi

I was just surfing around, when i saw a really cool effect, on this website (https://www.shopcomposition.com/secure.aspx). ( when entering the site, click on "NEW )

Does anybody have an idear how this is made?

Thanks

[GW02]

It's a combination of a basic scroll with a layout in an MC beforehand and some code to make them fly off if they're off too close to the side, probably placed within each image MC.