Complex sentence: The second involved a 900m fall down the Lhotse Face in an avalanche; he received only a broken nose and a few cracked ribs and was lucky to have survived the ordeal.
Split into simpler sentences: The second involved a 900m fall down the Lhotse Face in an avalanche. Miraculously, he received only a broken nose and a few cracked ribs and was lucky to have survived the ordeal.