In case you were at all wondering, the inevitable did indeed happen whilst I was in Salzburg. A Sound of Music singalong happened.
In all fairness, the singing was prompted by Andreas (tour guide extraordinaire), who was fond of blasting the soundtrack as we hurtled through the Alps in our little coach bus. The bus driver, in turn, was fond of keeping the bus bathroom locked, so there really was no escaping. The only thing left to do was to sing as loudly as possible, and to pretend that you didn’t know every word of every song, including yodel solos.