This video Gegard Mousasi shows how to triangle choke someone in full mount.

http://mmalice.com/gegard-mousasi/gegard-mousasi-teaches-how-to-triangle-choke-from-mount-submission-video_4c2aec803.html

http://mmalice.com/gegard-mousasi/gegard-mousasi-teaches-how-to-triangle-choke-from-mount-submission-video_4c2aec803.html