I don't know any cover versions of this song. I do know the original Napoleon XIV version, though. It's most likely about the guy's girlfriend (or maybe even wife), and she's left him. Apparently, he loved her so much that he went mad because she left. Apparently this madness is the reason they're coming to take him away. There's two other songs, "I'm Glad That They Took You Away, Ha-ha!" and "They're Coming to Get Me Again, Ha-ha!" You can find them on YouTube.
I don't know any cover versions of this song. I do know the original Napoleon XIV version, though. It's most likely about the guy's girlfriend (or maybe even wife), and she's left him. Apparently, he loved her so much that he went mad because she left. Apparently this madness is the reason they're coming to take him away. There's two other songs, "I'm Glad That They Took You Away, Ha-ha!" and "They're Coming to Get Me Again, Ha-ha!" You can find them on YouTube.