What should I do

[ewiar]

First, I think I should clarify something. I'm sure that I probably was bending at the waist when he called me on it. As I mentioned I've been reffing relatively seriously for four years so it's pretty ingrained in muscle memory. I didn't argue vociferously with him. I just started to say "Really? I thought I was moving my feet." when he cut me off. I haven't reffed official league-sanctioned high-school games but rather JV age (and skill) level tournaments for the local select team. I dont' plan on sending the letter and I don't think I really did when I made the initial post. The cathartic release seems to have quelled my outrage and I think I'll be able to just let it go.
Thanks a lot for your support and advice.