1. Mick: "John McVie on vocals... jew jew jew jew...First time ever."
I think he was just hyped up from the energy of the show. Certainly not the audience.
2... I've heard it was called "The Dance" as in "same old song and dance"... and then I've heard it was inspired by Henri Matisse's painting. Who knows?
3. I tend to skip that song actually.
4.