The guillotine is great choke that all grapplers should know how to apply and defend. Guys like Marcelo Garcia, Joe Stevenson, and Cody McKenzie have all added their own unique twists to the technique (ex. The Marcelotine, The McKenzitine, etc).
The Loop choke is another great example of a grappler adding their own unique twist to this common submission, shown here by C3's Chris "Chaloopa" Garcia, Chris has won both his professional MMA fights with this choke!
Props to NWFightScene.com for the cover photo!