hitting them with a planet.
A "10th planet"? You a Bravo guy?
I'm a big MMA fan(watched every UFC event but one over the last ~15 years) but I'm glad it wasn't around when I was young as I know I would have a lot more concussions. I would have absolutely given it a try.
I have considered getting into BJJ now as a form of exercise, but with a history of knee problems it just seems like a chance I'm not willing to take. All it takes is rolling with one over-enthusiastic partner and my quality of life in retirement takes a big hit.
I do love grappling though. Never been a big scrapper, but most of my tussles ended up with me on top on the ground. Body mechanics are fascinating.