Last night, I watched my newly purchased Billy Joel Live at Shea Stadium Blu Ray. All of a sudden, when We Didn't Start the Fire began, I heard something very interesting: it sounded like the tuning changed. I could tell the show up to that point had been played in Eb, down 1/2 step as Journey has been doing for most shows the last few years. I picked up my guitar and confirmed it. All of a sudden, they switched to standard tuning for at least that song.
Now, we all know a lot of these older bands are doing this these days (Foreigner, Def Leppard, etc.). But, I haven't encountered any band that switches between Eb and E tuning during a show for certain songs like Billy did here.
Just an interesting tidbit.
Any other musical types on here notice other bands switching between E and Eb tuning on the fly during a show?