After Gall gave up position with that unsuccessful guillotine choke in round 1, Sage had top position. Gall got out of it by having the flexibility while on his back of wrapping his right leg vertical on Sage's left hamstring. When I saw it in real time, I was like wuttttttt how he do that. Gall did have an underhook too, but he didn't have leverage until he got that right leg wrapped so that he could extend and threaten Sage's left leg. This forced Sage to give up top position. I find BJJ stuff like this fascinating. Gall has very good length and flexibility and knows how to use it.