Dear... Innocent Stranger
I was a dick.
Once I realized that I had was parallel with your cart and needed to get around you to my car I had two choices: speed up and cut you off or slow down and let you go ahead. I chose the dick move and sped up.
You then made a very pleasant comment, expressed from your clear surprise, to which I think I flippantly replied "Oh, sorry".
I then hid in my car and avoided looking your way, because I was so filled with shame. I'm still filled with shame. I treated you with blatant disrespect and hid in my own shame instead of properly apologizing.
I wish I remembered your license plate or something, anything so that I could properly apologize.
The only apology I can make is to consider my actions and behave better in the future. It's a lame alternative, but all I have.
So I hope I continue to feel this shame, so in that I can correct my actions going forward.