hey, there's this music video http://www.youtube.com/watch?v=iB32Qu2OrnU and all it is, is numerous shots of bouncing balls flooding down the streets of a city and i'm wondering, did they actually flood the streets with bouncing balls, cause i'm assuming they'd pick up speed and eventually damage cars or something.. so it's cgi, right? what do you guys think?

side note, if you're interested, this was the original song,
http://www.youtube.com/watch?v=u9Ly-LUttL0

That was a commercial for Sony, it was all practicals no CG.

Check out the exploding paint commercial too. If I remember correctly it was a council estate in the UK somewhere that was up for demlotion so Sony put thousands and thousands of litres of paint bombs in there.

Again all practical.

And check out the Sony Walkman ad, all the people playing one note each, very good.