Vroom Vroom, oh man

The other day I needed gas, as one does when they go vroom vroom with their cars. After leaving the gas station booth with a gatorade I drove out of the parking lot getting 100 yards before realizing with sudden anxiety that I had left without putting the $10 of gas in my car that I had already paid for. 
Since I have very little money I was more overcome than usual with worry that I would lose the $ if I didn't get back there quick. I made the mistake of making a sharp left u-turn into the left lane going the opposite direction. A mistake I say because I could have caused an accident as the woman behind me pointed out. 
She herself almost causing an accident as she violently halted her car next to me, rolled down the window and with a face resembling a tomato injected with growth hormone screaming "what were you thinking, you could have caused an accident..." I sat there observing and felt the oneness of the situation. I had acted out of anxiety and so was she without thinking of "what if's". What if I had had a bad day and was a suicidal psychotic individual who could go over the edge with a little push? 
Thank god that was not the case but it was comforting to me in the moment watching her slightly irrational anger thinking that I liked that life was unpredictable. That people weren't robots statistically thinking through their every move.