I must buy that - the whole idea of Domingo and Norman in Lohengrin is just too awesome.
We were lucky enough to see one of the other three tenors - Jose Carreras - in one of Hampton Court Palace quadrangles, maybe 20 years ago. We had seats in about row four (on a corporate hospitality junket). In my rush to get to our seats, Carole said "did you see who you just shouldered out of the way?" - "er, no" "John Cleese". Oops. He was about ten rows behind us...
That was one hell of a treat. VIP seats dead centre about ten feet from Carreras, with piano accompaniment.