Does anyone know what this scene was from?

I remembered it was definitely in a kids show. I keep thinking it was Bill Nye, but I remembered that the host of the show was laying down on a table or something. I don’t remember what the episode was about, but I remembered the ending of the episode really stuck with me. The ending of the episode ended with the host saying “hello?” and him turning to the camera and saying “goodbye” in a terrified voice and after some laughter not from the host, but somewhere else. It was in a dimly lit room too and he was still on the table. I swear I’m not making this up. It’s not a creepy pasta either.

I’ve been looking for this for years. I kept thinking it was a Halloween episode, but I think I looked up the Halloween episode of Bill Nye and it didn’t end like this. Does anyone know what this might have been from?