Many years ago I took my mother to see Kenny Ball at the Gordon Craig Theatre in Stevenage and managed to get seats right in the middle of the front row (there is no centre aisle there).
After a quite pleasant first half, apart from getting covered in spit every time the brass players cleared out their instruments, we retired for the interval.
When they came out for the second half my mother nudged me and said "can you see that?" "What" said I. "Well" she said, "in the first half he was dressing to the left and now he is dressing to the right". I was never able to see Kenny Ball or my mother in quite the same light again!