Some things to notice when watching
Remember when Ernie's "sitting" in the barrel? And how he pulls it up and has legs hanging from the barrel, and they're obviously fake? How did he gert those? Did he plan this joke before hand?
On the train, Maria and David are definately a couple. This was obviously made before Luis came on the show. Maria then pecks him on the cheek.
Oscar's "swearing" at big Bird "You are without a doubt the stupidest .............Bird I've ever met!" is just a bunch of mumbling , resembling Muttley's classic Mumble cussing. (ei Razzin' frazzin' humma muh muh rrrggg)
When Erine unwraps his present, you can kind of tell that Bert's reaction is improvised. Apparently, they had trouble manipulating Ernie's hand to open the present quickly, so Frank ad libbed the line, "wrapped it pretty good, didn't I?"
Richard Hunt is credited for an appearance, but only as an extra puppeteer. (I'm probably worng about this! WHo did Richard Hunt play? None of his regular characters were in the special)