Well, I've never seen this particular show, so I'm not comfortable in saying how accurate it is, but I do indeed believe in ghost sightings and such. I saw this on Google, (kinda earily jumped out at me because Jim Henson was not at the forefront of my mind for once lol), but somehow I missed it.
I was going to post it on here, but because it a. wasn't a muppet sighting, and b. was somewhat more serious in nature, I wasn't sure where to put it.