I don’t know if I’d call it creepy, per se, but the episode(s) where Buffy’s mom died was probably the rawest emotion ever on the show. There was no musical score in the entire episode, something I didn’t even notice the first time through, so it had an odd funereal feel to it. Even after having watched it several times, Anya’s breakdown is still so heart-rending, the idea that she honestly doesn’t understand so overwhelming, that I still get a little misty watching it (despite the little retcon later in series that shows she’s wasn’t always a demon). Hearing people’s voices while hearing what they mean? Harsh.
There. Now I’ve done it. I’ve got to go watch it again. 