Dang. That's scary stuff. Several years ago before I moved to Colorado I was visiting a friend in Fort Collins and wiped out hard on the South Valley Trail at Lory State Park of all places. Just too much speed and too little experience on the loose dirt. Not sure how long I was unconscious, but I woke up about 15 yards off the trail. I remember getting back on my bike, but the next several hours are a total blank. Somehow I managed to work my way to the lower Horsetooth trailhead and meet up with my buddy who had been waiting for me to catch up. It didn't take him long to realize that I had a serious concussion as I kept repeating the same question to him over and over and over. I've tried to relocate where I crashed, but I cannot remember enough about the wreck to know for sure.
Anyway, I hope you heal up soon.