Control

If you decide to bring a bag with you onto the train, please try to pick one that you are able to wield ablely without smashing into your fellow riders. 

The first time you hit me in the face with that nylon zippered collection of text books, I smarted and nudged it away from me.

The second time I added an, "excuse me."

The third time my maneuvering of you a foot away from me with a push was my way of keeping you able to chew solid food. 

A fourth time, if it happened, it would be a party on board this train with rainbow arcs of paper, pens, and your screams of, "what are you doing to my backpack crazy man?!"

I would just give you a toothy grin and say, "Justice!"