No doubt JM would mess up your day in a big way, but I am reminded of what an 88 year old veterinarian told me at our shooting club decades ago. A few of us younger men, mid 30's I think, were jokingly conversing with him and others, and one of the young guys began talking about self defense fighting and how he thought he could easily take down the old man. The wise old man said, "Son, you never want to get in a fight with an old man, for he knows he is old, easily hurt and cannot fight like he did when young, so he will just shoot you right then and there."