Many, many years ago I went to work on my now ex wife's Pinto. I was frustrated about something and in a hurry. I tossed the hood up and leaned over to go to work. Just a fraction of a second I remembered I wasn't working on my Mustang with spring hinges.....her Pinto of course used a prop rod to keep the hood up. I was trying to jump clear but it was too late and the falling hood caught me across the bridge of my nose. I learned why cartoons show somebody seeing stars...... I had a moment of black out with splashes of light in front of my eyes and fell to my knees, would have fallen flat if I hadn't grabbed the bumper on my way down.
Never made that mistake again.