pretty much all your arguments about the rear ending apply to the mug as well (I think we all know someone who drops/damages objects more often than most, and y

pretty much all your arguments about the rear ending apply to the mug as well (I think we all know someone who drops/damages objects more often than most, and you can usually link said instances to a lapse of attention). The only difference is the severity of the outcome and thus the importance of avoiding behaviours which increase the risk of it occuring.