As expected, Fisher follows "Eruption" with "You Really Got Me," and the whole band, minus Steel Panther guitarist Satchel, joins in.
Apparently, Fisher challenged Satchel to a guitar duel at some point before the show, which led to his being invited on stage with the band.
At the very end of the clip, you can read Satchel's verdict on who won the shoot-out.
As always, (since Steel Panther is involved), the video below is uncensored. It features foul language - in the presence of an 11-year-old yet!