Sometimes I am stupid!

I was driving and the car in front of me was slow. Excruciatingly slow. I start flashing my headlights to warn them I will pass.
I decide to honk the horn as a double measure...

Why did I honk?
Because I realized that if the driver was blind he would not see the headlights flashing.
(I swear that was the real thought that crossed my mind as I decided to honk.)

I want to know if I am the only person who has moments where they are just stupid?? Moments where their brain has gone to bed before they have?