First time hearing “Thunderstruck “ by Acdc & Axl Rose (reaction) 

Axl did a great job, and he won a lot of cred for showing Angus proper respect by not upstaging him.

Brian was unable to perform shortly into the tour this video is from, due to having issues with his hearing. It was thought at that time Brian might not ever perform with the band again, but has since sought treatment and is back on stage for their current tour. Axl was asked to fill in for Brian for the remaining tour dates and he gladly stepped up and did double duty with both AC/DC and GnR, even having a broken foot for a significant portion of the tour. It was never supposed to be Axl replacing Brian in the band. It as favor to Brian & Angus so the band could fulfill their touring obligations.