When on a fur-trapping expedition near the top of the Missouri River in the early 1820s, Glass was mauled by a bear. The injuries were gruesome. Glass had a broken leg and his back had been clawed down to the bone. When he was left for dead by his group, things looked bleak. The only hope for recovery was at a fort nearly 200 miles away down the river. After crawling for six weeks to reach the Cheyenne River while subsisting on twigs and berries, Glass floated the rest of the way to safety. Once he had fully recovered, Glass set out again looking for revenge against the men who left him. He did track them down, but chose to forgive them. A true badass with a heart of gold.