User blog comment:Tyrannoraptor/Did Ridley ever got hurt or killed by a fall from high up to the ground?/@comment-26501002-20150418070359

Do note that planetary surfaces may also be different than that of Earth. It is possible that Ridley never sustained severe injuries - with some exceptions, hence the part-mecha form. If Ridley is able to control his decent at all, he can guide himself to a location in which his landing would be more cushioned; like a field, hill, sandy area, etc. Plus, the level of Ridley's intelligence makes this idea perfectly plausible.