A simultaneous arrival the other night with the race car driver was a young Amish man injured in a barn raising. Sixty men besides him were raising a beam into position, when his head got trapped between an existing beam behind him, and the one that they were raising. He crushed both sides of his skull, which had to be put back together like a puzzle. A small epidural bleed was evacuated by the neurosurgeon. Epidurals do well if operated on early, but they can also deteriorate very rapidly. He arrived in the ICU with a catheter inside his ventricles to drain excess fluid and prevent pressure from building up. This is in contrast to the racer mentioned below who had no ventricular space left from which to drain fluid.
The young Amish man was extubated within several hours of his arrival and transferred to a step down unit across the hall. He was very, very lucky.