Apparently there's a Canadian spin-off of the BBC science-fiction series Primeval. To generate a little marketing, they are releasing audio and visual effects for fans to use in their own videos. (A sample from PrimevalNewWorld.com is below.)
I'm sure they're being released with all the usual disclaimers, but these look like they could be a lot of fun to play around with. Get yours now before someone in corporate shuts it down!