Head Case #1 from this past weekend was a young teenager who decided to take a joyride down the highway at 90 mph in the wee hours of the morning. The medic's pictures from the scene - images of twisted metal that once belonged to Daddy's sports car wedged beneath a tractor trailer - clearly illustrated the two or three inches of space that hung between Junior and decapitation. That he survived with little more than a few bumps and scrapes is nothing short of a miracle.
Later in the weekend, two dudes accompanied their bro into the ER requesting sutures status post bar fight. A full two minutes after the nurse finished drawing labs on the patient, the entire department heard a powerful thud echo from the exam room. Turns out Bro #2 wasn't comfortable with the sight of blood and syncoped, landing head first on the hard tile floor.
But by far the best example of abusing one's noggin came from my patient who decided it would be a good idea to get some fresh air by sticking his head out the window of a moving automobile, just in time for his skull to make contact with very immobile traffic light.
Some people would do well to consider wearing helmets.