Last Sunday at the club I was watching a fellow shooting skeet with his autoloader. He took his position on the pad, popped a shell into the chamber, closed the action, inserted a shell in the magazine and then decided it was the appropriate time to hand tighten his extended choke tube. 
It's not the first time I've seen shooters do this. I saw one guy, an experienced shooter who should have known better, finger tighten his extended chokes with this left hand while his other finger was in the trigger guard of a loaded and closed o/u. I mentioned it to him after he finished shooting and he hadn't even realized what he had done. If something had startled him causing him to pull the trigger he'd have probably blown a couple of fingers off.
Anyone else seen shooters doing this? Do you mention it to them when you do?
It's not the first time I've seen shooters do this. I saw one guy, an experienced shooter who should have known better, finger tighten his extended chokes with this left hand while his other finger was in the trigger guard of a loaded and closed o/u. I mentioned it to him after he finished shooting and he hadn't even realized what he had done. If something had startled him causing him to pull the trigger he'd have probably blown a couple of fingers off.
Anyone else seen shooters doing this? Do you mention it to them when you do?