I did see that one...even almost posted it for you but decided not to.....the reason why you ask. I do disagree that a truck hitting you at even 1mph will not bowl you over. I do agree though that a meat ball traveling at that high of a speed could and probably will inflict some serious damage. However our arrows are traveling no where near that ball park figure in difference....not even in a different ball park on the same block! or even city
The differences between truck and meatball analogy and our arrows would be relative and I would think directly proportional.