Sorry to hear about this. I hope Grant heals up OK.
I'll add my story here as well. I was once on a solo cross country trip and planned to stop in California, somewhere west of Death Valley. It was a nice evening crossing the desert and I kept going to the point that when I wanted to stop, there was no room at the inn. I had a tent and decided to continue to Death Valley and camp overnight. When I got there it was hot, Very hot. It was after dark, but I knew that I could not sleep in that heat. In fact it was uncomfortable just standing still in that heat. There was a full moon and a little car traffic, so I decided to continue through Death Valley and stop in Nevada.
Once I got up out of the valley back into the desert it cooled off a few degrees and I felt pretty good, so I decided to continue on to Vegas, and once there I still felt pretty good so I kept going into Utah. By then it was daylight and I had been riding for over 24 hours. This is when I made the stupid decision to continue across Utah to my next destination, only a few hours away. Although I had been drinking water as fast as I could, I think the poor decision was due in part to dehydration.
Anyway, as I was crossing Utah I had several episodes where my brain would switch off for a second or two. I think it's called a 'microsleep'. I shook it off each time and did whatever I could to stay awake. I finally did get to Arches, where I set up camp and slept a few hours in the heat of the day. But later, after resting and drinking a couple of gallons of water, I realized how lucky I was to get there without incident.
"A man's got to know his limitations."