NEW : Brother of injured rider encourages fan to pray for him . Caleb Moore was competing in the snowmobile freestyle event . He was trying to do a back flip with his machine when he came up short . The accident happened on Saturday, and it is still unclear what caused the crash or how many people were involved.
NEW : Brother of injured rider encourages fan to pray for him . Caleb Moore was competing in the snowmobile freestyle event . He was trying to do a back flip with his machine when he came up short . Moore was struck by the machine while falling down the landing hill .