Nice write up on Mike's jams... I could go on for days about this and the tendencies that the band has had through the years, and whether or not they were communicating well with each other that day.

I'm sure we're not all musicians on this site, but I am, and I really hope we can continue to talk about these questions in terms of the actual music chart associated with the song.

So to continue emil's point...

Mike's groove = F#m A B
closing chords = D E F#m (at least twice)
chromatic fall = F#m down 12 half steps to F#m
final chords, or coda = F#m A E (8 times)
end on E chord for begining of Hydrogen

In modern times the "closing chords" are now played 4 times total instead of having a "second jam" over the Mike's groove chords and then two more sets of "closing chords"...

The best way to find out for yourself, like the OP stated, is to listen... and who doesn't enjoy a good Mike's???