I broke mine cycling too. But I have no idea what happened. I was on a side street, no traffic at all. When I came to I was on a stretcher being loaded into an ambulence, I didn't know what year it was or who was president (it was Reagan). I knew my collarbone was broken because every little bump along the ambulence ride was agony. At the hospital they gave me a neurological exam, told me that I had a concussion, and said I could go home. I told the doctor that I thought my collarbone was broken and he literally said, "I'll be the judge of that".
This was back in the '80s and people didn't wear helmets then. I do think that I'm pretty lucky to be alive, I know that cyclists have died from that kind of thing.
Welll....the whole story. It was a beautiful sunny day in Ambler. I decided to head over to New Hope , stay awhile and head down the Delaware River to Yardley, I-95 and home. On the river road from New Hope, on one of the lazy S-curves, I was leaning over pretty far, coming the opposite way was a black SUV and he was heading over the double yellow line. Two choices hit him square on the grille and get killed, or straighten up and pray. I chose the second one. Next I don't know. I blacked out, probably from fear. Apparently from the state troopers who came to the crash, fromv reports from the other drivers who were behind me, I flew off about 10 foot above the ground, landed on my chin part of the helmet and left shoulder, flipped over and skided 30 feet, spread out like an eagle. Everyone thought I was dead. 30 minutes later an EMT came. Don't remember that at all. They took me to St. Mary's Hospital. It took about another hour or so to come to. Of course, they took X-Rays. I had a lot of contusions on the back and ass where I slid. The collarbone, really didn't hurt and it took several hours before I could remember anything. Once the shock wore off, man, my body was in pain.
Funny thing I went looking for my m/c, found it, the front fork was bent, but the state trooper who found me wanted to buy it. I sold it to him for a couple hundred bucks. It was my little Suzuki 650 S.
I kept my Ducati 851 for awhile then sold it, when I no longer had a desire to go on the crazy roads again. That was in 2008. But in 2015 I did get a hankering to ride again, so I took a PA. MSF course for fun. I was 65. Funny I got the highest score combined, beating out a bunch of hotshot 18 year olds.