I took a class recently at a local range, with a great reputation. Class was great except one thing. One of the instructors believed my finger was on the trigger, I understand this is a big no no if you are not about to shoot. Now the first problem was the instructor wanted to be able to see my finger high on the slide, this finger placement was not made clear to me. I thought off the trigger was what was expected, so my finger was on the frame close to the trigger guard, not the trigger. When it was clear what he wanted it was not a problem to do as told. To me, the most shocking thing was the method used to get my attention. This instructor would thump the back of my head. he did this twice. I though it was very unprofessional, and frankly it pissed me off. I'm just wondering if this was a unique experience. I tend to think this guy did not like me are the glock I had at the time. All the other instructors where very helpful. Just looking for some input. I never thought I would let someone thump me in the back of the head when I had a loaded 10mm in my hand. If he did it again I believe I would have put the gun down! And what about the finger placement on the slide, is that a good idea? Thanks for your input!