Why didn't you sit him in
Well, I'd thought about that for a brief moment, but then thought better of it. He was not at all qualified to operate a plane. Were I have to put him in the plane, and what happened - happened, I would have put a complete non-pilot in control of an aircraft, then put that aircraft in an accident. That would have been big trouble for me! Had he been hurt - very much worse!
As it was, we both watched an accident from a safe distance, and no one was hurt. It was little tiny trouble for me.
In hind sight, it was not good, but not catastrophic either. I have learned that I now always check the throttle, and I would have kept looking, 'till I found
something to tie the plane to. From what I witnessed, I believe that even had I chalked it, it might have jumped the chocks anyway, tying is the only way to be certain.