5 minutes into the approach for Na-Ga canyon in Capitol Reef, a large boulder came loose while we were climbing over it. It threw Abigail and myself out of the way, while it pushed 14 year old Sam off a 20 foot cliff. Luckily the boulder stopped at the edge and did not follow him down. Sam landed on his pack which had a water bladder in it and took the brunt of the force. Then Sam rolled a short distance down the hillside, breaking his nose and a few other bones in his face. He was able to walk out under his own power and make it back to the car. My wife had led a group through Na-Ga the previous week and some of the group went over the same Boulder without issue, and it wasn't a rock that you'd ever suspect to move. A week of rain in the park had most likely loosened up the boulder. The main takeaway is to be more cautious when hiking on and around boulders after recent rains, it is surprising what can come loose. A picture from the spot where Sam rolled off the edge of the cliff. The boulder that rolled. The cliff from where Sam landed.