I’ve developed this problem. Knocking at the door and there’s no one there. I’ve slept on the couch with the door open just so that I could catch the people that obviously weren’t there (as it turned out). Uh, had other, stranger audio hallucinations which have been on par with having the d.t.'s, without actually having the d.t.'s. And I really do know what I’m saying here, unfortunately. It’s a lot like living in the Twilight Zone…