The Brecker Brothers headlined the UNC/Greeley Jazz Festival a few years back. Mike was doing a clinic, but the Lab Band I was in had rehearsal at the same time. Several members were more than slightly perturbed by this, but we had to do what we had to do.
As soon as the rehearsal ended, we piled in a car and hauled arse to the Civic Center, where the clinic had also just ended.
I did get to meet Mike and talk to him for a while, and get his autograph. I told him I had to miss the clinic because of the rehearsal. He said, 'Well, I'll do the whole thing again, just for you.' 8~)