Those are going to start getting really popular. You don't think about it much, but it wouldn't take much for a baseball to kill a man. A 90+ MPH fastball in the wrong spot on the head or face, or in the chest, that's all it would take. Liners come back at the pitcher or infielders much harder than 90+ at times. It's remarkable to me that only one MLB player has been killed on the field in history, but it's happened much more in amateur and foreign baseball. Sad.