Grandma just smiled and nodded a lot and that seemed to work fine for her. Sweetness always tries to carry on a conversation from at least one room away and it is amazing what I tend to hear or not hear sometimes. Like most of you right hand shooters, our left side high frequency hearing got left at the rifle range. She knows that I have a good ear and a bad ear and I always have a built in excuse for saying that I didn't hear her say something.
