They're Apophysis renders that are blended with the main render. It's actually pretty tricky to get the hang of, I had to make 15 Photoshop layers because I applied the image a whole stack.
Can someone please make me an awesome signature? I don't know how to make them. All I want is that it has a good yoyo on it. Look on www.yoyostore.com for some good Ideas. You can also look on www.yomega.com. Try to find some others if you can. There are some nice Ueropean yoyoes out there.