A BIG BEAR standing in his path!!!!!!
We don't have ghosts on the mountain, but we have other things that go bump in the night.
Before you get worried and say you are never visiting LeConte again, the rest of the story goes something like this...
Dave screamed and picked up a rock and threw it at the bear. The bear got scared and turned around and ran. I think Dave scared the bear more then the bear scared Dave.