When you’re walking somewhere, like to board a train in LA that’s headed to San Diego for example, and you’re in a hurry but the person in front of you is not but you think that by getting in their personal space and walking a quarter shoe length behind them will inspire them to walk faster for you, you have a really good chance of running into them…hard…if, for example, they should stop suddenly to do something, like change direction, which incidentally is perfectly within the realm of possibility if the bar car is behind me. And if you follow me so closely next time I’ll kick you in the shin.