We just can't get away from those guys in white lab coats.
Sibling #3 got hit by a car while riding his bicycle on the snow covered streets. His brakes failed and he slid into the intersection and got nailed. One helicopter ride and three broken ribs later, he ended up in the hospital. Fortunately, there don't seem to be any worse injuries. He should be released tomorrow. Prayers appreciated.
The main thing to look out for with broken ribs is complications. Broken ribs usually mean shallow breathing due to pain. If the lungs don't expand all the way it can lead to a collapsed lung, pneumonia, or other upper respiratory infection.
Strangely enough, you should sleep on the side with the broken rib, so the other side can expand all the way.