I just pray that The Who doesn't surprise US with a "special appearance" if they play Pinball Wizard by some unannounced "special guest".
Just ask the Legions of Harley Riders how they feel about unannounced "surprises" at the Milwaukee Lakefront for The Harley Davidson 100th.
He opened with, Funeral for a Friend and followed it with Goodbye, England's Rose.
The crowd needed energy.
Saturday Night... and The B#tch is Back would have fired up the crowd that waited all day for this unannounced act.
And when the Old Rocker would have needed to catch his breathe, he could have moved into Goodbye Yellow Brick Road. The crowd would have sung and swayed to the words. The demographics indicated that evryone knew that song and maybe even liked it.