Moosmom - here's how I understand it:
This old friend of her parents was once driving to his ranch, and towing a large trailer - about the size of a horse trailer. He thought it would be easy.
However, he had no experience towing a thing this size, and the road got worse. Finally, the trailer pulled the truck off the road, and the whole contraption rolled over a few times.
His head was split open - but an ambulance just happened to be passing by, stopped and got him to the hospital.
That was one reason he lived to tell this story - the other part is that there happened to be a neurosurgeon's conference at the hospital where he was taken - so he got life-saving surgery right away!
Some Angel was watching over him!
"Common sense and a sense of humor are the same thing, moving at different speeds. A sense of humor is just common sense, dancing." -- William James