User blog comment:Secronz/Skyrim video from Comic-Con/@comment-4212697-20110728050421/@comment-174.52.106.54-20110803224052

That would be possible if bethesda bought natural motion (like in gta 4 and red dead redemption) but other than that, it was a dead body(ragdoll) statring from that pose, in the part of the air, so it is just pure ragdoll physics.