We had a weird relationship, you might call it friendly antagonism. He was one of my favorite teachers, and I think I was one of his favorite students.

We regularly exchanged insults, and laughed about it. This idea grew out of that, and despite his protests, I'm pretty sure he thought it was funny up until a football player full-on tackled him during a lesson (was not my idea, and I even admonished the guy on the website).