I was through hiking the Appalachian Trail last year, when I got lost and found myself off the trail, in a strange, dark hollow with heavy moss and one running stream. It was getting dark, and starting to rain. I found a cave just above the creekbed, and there were no bear-tracks, so I went in for shelter. Sometime in the night, a bear DID come, right into the cave, and I had no way out! Keeping my head, I crawled deeper into the cave and found a passage too small for the bear to fit. It led to a long crawlway ending in a little alcove. Credited to BlackEyedClown