Yesterday three other guys and myself set out to do a 100. About 20 miles into it we are going up a slight hill and the guy in front of me goes to shift down and his chain slips, he slows down a little and I ran into his back wheel. Down I go and the two guys behind me. I landed on my left side hard and my head bounced once. One of the guys behind me skinned his knee up a little and the other guy made it through okay. It felt like when the air get knocked out of you but after about ten minutes I thought I could nurse it back home. After about five minutes of that we stopped and I one of the guys called his wife because he could tell I was hurting. Came home and the wife dragged me up to the hospital. One broken rib, some swelling around the tissue of my new knee and some lost skin on my hip. It's hurt today but I'm glad it wasn't worse. Yesterday was one of those rare calm days up here and it upset me it happened on such a beautiful day to ride.