I agree with Pensaboy : nothing specially wrong here. no broken string, no out of tune, no problem IMHO
It's "just" that the solo is almost completely different from usual
about "fixing the guitar", I think it's more about gator blood : the strap is maybe not correctly fixed ? or the capo isn't corectly fixed ?
remember that for Gator blood he has to take the bottleneck, maybe is he searching it in the dark ? maybe all of this at the same time ?
usually, "switching" on a guitar means switching the pick-ups combination. Glenn Sagger has to prepare the guitar for Mark : right tunning of course, but also the right switch position.
maybe is it wrong here ?
or maybe is he talking about switching between the 2 guitars ?
"wait a minute Glenn, let me take off the red strat before giving me the white one !"