He was skinning a bear. I was terrified at first, because the corpse resembled a naked man quartered between two trees. He'd created a deadfall trap over some big talus blocks and the bear had fallen in. He used the skin for something and jerked the meat. If it wasn't astonishing enough behavior in a national park, the next day he made donuts, using bear fat for grease ! Surely, by now, he's created an empire somewhere in the world...