I got caught with this submission about 15 years ago and it’s stuck with me. To my mind it’s the most annoying way to get subbed in BJJ just because of the emotional roller coaster from “I took their back I rule” to “wtf was that cheap $*#!” Some folks like to build games around doing weird submissions from inferior positions. I know a couple of black belts who love to give up their back so they can try to catch arm-bars.