I think he may have just had a brain fart and forgot to figure in the elevation of the mountains into his calculations of when to safely pull.  When you are an experienced skydiver as this guy most like was you also have the disadvantage of the complacency that comes with repetition.

Francis Xavier is a seasoned writer for Unofficial Networks, bringing a lifetime of outdoor experience to his work. Having lived in a ski resort town for years he has a deep connection to mountain culture....