lol, dont let it get to you, use it as a tool to not do it again, we all make mistakes and that is part of taking courses, get your sling tighter and that will help. You were empty for the record, but you know better, there were more expierenced shooters out there doing the same if not worse
If you remember my sling was attached improperly since my sling plate hadn't come in so I had to hold the gun the whole day, but yea I'm bad about it I suppose