Lila64 said:
But it might have helped that Bowie was in the audience, if I do recall correctly. I got RHCP snippet in L.A. this tour, Costello instrumental snippet on Elevation tour (and yes, I saw Elvis at the mixing board on that one!)
Yep, it seems sometimes Bono does that. Butterfly With Bullet Wings first came about due to Billy Corgan being in the audience in Chicago.