I went to the Scottish Rite Temple to tune a piano for a performance the next day. The janitor, who hardly spoke any English, directed me to an old upright on the stage. After I was almost done tuning it, he appeared sheepishly pushing along a small grand piano on the floor below the stage. Apparently this was the piano I should have been tuning.
I was really upset, but I managed to quickly tune the grand and was only a little late for the next appointment.
I can't remember the last time that happened.