I've not been pulled over much in my life, but I remember being stopped for speeding (this in about 2004)... and as I quietly waited with my hands on the steering wheel, this very young cop comes up from behind me along side my car and is oddly positioned. At that point I turn around with my window open, now looking backward and asked him "do you actually have your hand on a gun?" He did! I was floored... for speeding? I guess people do crazy things, but I'd never seen such a response.
Nowadays, I think you don't DARE show any signs of resistance or movement toward (or away) from someone holding their service weapon. And it doesn't seem to matter if you appear elderly or not.