Back story, my DS has autism, disabilities, and health problems.
I had to pull over on the way home from school because he was having a seizure in the car. I managed to get him stable enough to rush him home.
I got home to find a work van parked over my drive.
I beeped a couple of times and nothing
So rather than just beeping I sat and leant on the horn for ages.
A man came out. I didn't even look at him, he moved the van, I pulled into my drive and he smiled at me so I just gave him a look of death and carried my DS in stomping as I went and slammed my front door.
Now I've calmed down.... I must have looked unhinged.
I'm forever going to be known as "that strange angry woman" aren't I? 
Please tell me your stories of misdirected anger or over reactions to make me feel better.
I'm honestly usually a very calm and reasonable human being. Not a huge burning ball of rage. 