MMA Tampa Coach and Brazilian Jiu-Jitsu black belt Matt Arroyo shows the secret to the Guillotine choke! Gracie Tampa South MMA instructor Matt Arroyo unveils his lethal guillotine choke!   With Chael Sonnen’s main event victory over Mauricio “Shogun” Rua at UFC on FS1 the entire MMA world was reminded how powerful the guillotine choke…