how to do and what is the name of this trick

:8 to :10

Its a whip combo, there are countless ones out there. Take a look at this for an idea, its not the exact thing though.

http://vimeo.com/4099134

Like J. Lev(Xdohl) said, it’s a combo.
There are many versions of this combo come from Jade Whip. Practice the trick itself and you can get creative from there.

P.S:You don’t have to copy the embedding from Youtube. Just copy the URL, paste it on the forums, and your video will appear with no extra code.

How do you do that trick at: 17-20

It’s a double hand follow. You need to swing your yoyo around as well as the string. You release and catch the string… it’s a hard trick to have a tutorial for…

It’s, like Mark said, a two handed follow. I think it’s just doing a basic Follow while also following around the slack with your non-throwhand. It’s pretty hard to explain.