If you don't know who Powell Perrault Bones Brigade are then you haven't looked into the history of skateboarding quite well enough.
Here some of the Bones Brigade show off some very early technical sliding with that badass old school style. I seriously love this video, so much history and so much skill.
If you want to see the full movie, just search "Future Primitive Bones Brigade" on youtube. The whole movie is available fo free.