I remember an incident like this when I was in High School.

The Teacher was a Marine Vet and he just asked the guy to step outside so they could talk about this off the school grounds. So they did.

And all they did was talk. And after that everything was cool.

The student went on to be a Dentist. I still see him from time to time, and while he has never discussed what he and Mr. Brown talked about he has said it was some of the most important advice he has ever received.