Re: Was this a false start by Bonzo?
It's fun to conjecture about this stuff.
It could have been....He hadn't played live for so long with these guys, maybe he needed to "rev the engine" before driving away lol. Maybe he wanted a little attention too.
Testosterone combined with adrenalin of that magnitude must be hard to contain. Maybe he was saying, "I'm gonna kick you in the ass tonight" Low T? I don't think so lol.
After playing/hearing that song so many times, he preferred to hear the added part, the natural evolution of a song, and more importantly, how the musicians feel for the song matures over time.
If it really was a mis-step, he covered it so good, that I can't tell.
Now go fetch your shine box like a good little Wumpus.