My sister just returned from a holiday in Greece. Her and her DP went on an overnight tour stopping off at lots of different places. Several times they were allowed to wander on their own, and meet back at the coach at a set time to depart. After a stop at a smal town, they coach driver waited 10 mins, then said over the speaker 'the old lady is not here. We shall leave her.' And drove off.
Obviously he was very unreasonable, but I now have a horrid image in my head of an old lady wandering round Greece alone.