This is a loop knot I stumbled upon earlier this year. Probably the fastest loop knot to tie that I've seen. Most others take a lot of line to tie and are fairly slow and intricate. I've started using it on all my flies and it seems very strong. Not really the best for thick line (like 40lb shock tippet for bluefish), but what is?
Just thought I'd share it with everyone. (disregard the strange guy actually performing the video).