It's not uncommon for Harmonie wind bands in France to stage joint events, combining two or more Harmonies into a single, multiple-concert event. They're always a bit competitive, in a friendly way, and our conductor at Ste Suzanne had been polishing us up for the joint event last Sunday with the Harmonie at Chateau Gontier.
The event was at the ex-convent Les Ursulines, a fine building, recently renovated, and featuring an excellent auditorium where we played. First, Chateau Gontier, then us, then finally the two of us together.
Security was tight as you can imagine. In fact the concert nearly didn't happen, since the town had decided that only one event per week could be held, and ours would have been the second in a week. Our conductor persuaded them that Sunday is the first day of the next week, so we went ahead.
I suppose I shouldn't have, but curiosity drove me, before the concert started, to open an unmarked door at the edge of the stage. I followed a narrow unlit spiral stair to the 1st floor balcony, where some of my colleagues were already installed waiting for Chateau Gontier to start the proceedings. The door I came through was marked "Interdit au Publique", on the balcony side.
Since I had gone up that way, and it was much shorter, I ignored the sign and went down again when the time came to prepare for our part of the concert. Missing the bottom two steps, I clattered against the wall at the bottom, then staggered out of the door. The look of fear then relief on the face of the poor sound engineer was something to behold.