Are there any good tutorials?

Question

on pop-locking?

I'm trying to do the arm wave which is like the basic of pop-locking and I cant get my arm to bend! I start out with the wrist fine but when it gets to elbow i can't do it. I don't know why! Anyway, I really wanna learn how to do other moves after that but I can't past it. So does anyone know where I can learn how to pop-lock? video? website? anything?
Thanks!

Answer 1

http://www.hiphop-dance-videos.com/dance-move-clips.html
http://www.amazon.com/gp/product/B0001EK9VK/ref=pd_cp_d_title/102-6385092-7349716