I can thoroughly recommend looking up Matt Serra's instagram. There's a great clip of him subduing a drunk guy who was threatening waiters in a restaurant. I can't link it because of naughty language but it shows how basic (and funny) BJJ can work.
When Shirtless Dude finally sobered up, I hope he realised how fortunate he was that Matt Serra was smiling and telling him to calm down while sat on top of him. Could've gone down a whole different path!
I liked his hand over to the Security guy. You can see in Serra's eyes when he saw the Security, he was like... "just you dude?" Fair enough no one outside of MMA/BJJ would know who he was. Also. Lookit the size of Serras arma vs that guy's torso lol
Anybody seen a video showing how Serra got him to the ground? I'd love to see that part, too. (In the clips I saw, he already had mount.)