Really Strange
The case of Terrence is really strange. By all accounts he was a grounded young man with his whole life ahead of him. He's still not been found. It's hard to not link this case and the case of Connie, https://www.vanished.us/cases/connie-jo ... -mountain/ together. Same day, same geographical area.
From memory it was about 40 miles between them as the crow fly's. Unsure if you watched any of the Gold Rush series on Discovery but some of the locations of these mines are exceptionally remote. The thing with Terrence is that he must of wanted to disappear but what made him do that. As soon as you enter the Tree line at that mine your as good as hidden. It would have been easy for him to shout to him colleagues after running down that hill. If he was hurt you would expect to hear cries, screams, something. I don't subscribe to the conspiracy theory's about the film crew having a part in it but something made him run down that hill. Terrence was not nuts. I don't think he was having some sort of mental breakdown.