User blog comment:Tyrannoraptor/Did Ridley ever got hurt or killed by a fall from high up to the ground?/@comment-1608378-20150415192150

Most likely to both. He's still an organic life form (part mecha during Prime), so he will still be injured by hitting the ground with enough force or burning alive while entering the atmosphere. Like we see in MOM (and as was presented beforehand in something that I can't recall), Ridley is able to regenerate his entire body if at least a single cell is alive, so injuries shminuries for him.