Apparently this guy had been pestering him and challenging him for an extended period of time. Neer invited him to the gym to see if he could back it up. The guy was much bigger in person (Neer says 6'6", pushing 300lbs.) but was no match for a UFC veteran like Neer. Apparently this guy isn't in the ICU or anything and continues to trash talk on Facebook (lol!)
Looks like the mirror got taken down. The video was of Neer elbowing and punching the guy (who was in the fetal position) for about 12 seconds before being pulled off him but not before hitting one last soccer kick to his head.
Neer has two DUI's including an evading for a chase in 2009. When his name pops up I'm sure the police have a look. This video went viral and has been mirrored. Supposedly the police are looking into this incident but with Martin being a trained fighter who accepted the (spar?) with Neer it sounds like nothing is going to come of this.