Whoa, whoa, whoa, slow down. I thought the joke was that when he took the aging mask, he looked identical to how he looked before.
We laughed in the theater in 1989 thinking that was the joke and I have always thought that was the joke.
He…did look the same after he took off the “peel”, didn’t he? I thought Marty was being nice when he paused and said, “Yeah, ya’ look great, Doc” or something like that.