There are many tips and videos about dark slide on the internet. This may get confusion for you when learning this technique. However, I have made it easy for you. I have seen a lot of videos about Dark Slides and choose one the best you can see below. This video will make you easy understanding and do the right steps.
Image from: thekiteboarder.com
This video will help you more clearly about this technique than other videos. just check out video below.
Thanks to northkiteboarding. and wish you success in this technique.