I once drunkenly stole a porno from Wade Speyer's house. The porno took place in this old west town that had fallen under a corrupt sheriff and his goons, and in between scenes of people fucking anyway, all the actors talked about The Snake, who was supposedly on his way to clean up the town and restore order. The Snake finally shows up for the last scene that he shares with two women. He's dressed exactly like Clint Eastwood in the Dollars Trilogy, and upon being disrobed by the women, it becomes clear to both them and the viewer why people call him The Snake. You'll have to watch it 'til the end to find out exactly why (no spoilers!).
Anyway, I only realized the next day that the porno was a rental so Wade probably had to go through the embarrassing and expensive ordeal of paying for its replacement. Sorry about that, Wade. I realize that this isn't exactly dark, and not really obscure, I guess. But it's a fact!