Split the end of my collar bone when someone in front of me kicked up a stick and it locked up my front wheel. Totally freak accident. The little stick lodged between the outside of the rim and the inside of the brake caliper, parallel to the ground. Wish I had saved the photo someone took after I was loaded into the ambulance.
The rest of the group hid my bike in the woods behind a house the was vacant and in foreclosure. The GF came back to get it after finishing the ride.