Guy at our gym once had a straightner with a huge doorman at the MMA gym
Doorman was around 6'2 and 250lbs he was about 140lbs
Doorman had smacked him in a club on a night out
Fight started big guy pinned him and put his hand around his throat, he just wrapped his legs around his arm and got a full arm bar, guy started tapping, he just said , "no referee here pal" and broke his arm