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Dude look. You have broad shoulders and so do I. You have had them for a long time - longer than me considering you are in your 50s. My point is: learn how to wield them. Guys like us sit at an angle, or lean forward a bit. We do this because the person next to us ultimately doesn't need checked like a hockey player into the window.

Accidents happen and, as a result, protocol dictates we apologize. 

You did not. 

So me puffing up and checking you in return was my equal way of saying, "it's all good, bro." 

Your dirty look means nothing. Bring it.