Ok, a few weeks ago a kid showed up to our grappling class and signed up. He is 24 years old and at first I thought he was just socially awkward, but after tonight I just don't know what to do. Back story, this kid pulled me aside and asked me to personally train him, that he's not afraid of hard work and that he wants to get in shape. Tonight, we had a viewing party at our new gym for UFC 157 and that's when shit got weird. He was pacing back and forth all night, wasn't really watching the fights, was mumbling to himself making odd facial expressions and really awkward arm gestures, he didn't even know the fights were over when we started closing up. I had a couple of people, including my wife, say that they aren't comfortable with him training with us anymore. So here's my dilemma, this guy is BIG. Like 6' 200lbs ish'. I feel like training him is like handing a loaded gun to a little kid. My wife is ex-army, not much scares her and this dude makes her uncomfortable. Bottom line is that he has to go, but how do I break it to him? I have never had to ask someone to leave a class. My wife is concerned about his reaction when asked to leave. HELP! I was an Army Sergeant for a while and I CAN be tough if need be, but I have no experience with this sort of thing.