Oooh, all the plane/medical emergency ones reminded me of this - it was about 15 years ago but still makes me annoyed.
I was a Saturday girl in a 2-floor clothing shop (any UK Ehellions remember Etam/Tammy Girl?) and was working on the ground floor when our manager let us know that there was a medical emergency on the upper floor - a pregnant customer had, very sadly, begun to miscarry her baby in the fitting rooms. She was obviously hugely distressed and in pain, and an ambulance had been called. The store manager asked me and another staff member to clear racks to one side to make a clear run for the paramedics and to guide customers towards the other end of the shop for a short time until the lady had been assessed and taken to hospital.
I have never, either before or since, encountered such ghoulish and entitled people. We were being as polite as possible, bearing in mind the time constraints and amount of tasks to be carried out, and fortunately the shop wasn't too busy so moving the racks didn't create too much of an issue. However, a group of 3 or 4 customers became quite aerated when I asked them if they would mind moving away to allow the paramedics through and started to insist that they wouldn't be in the way, they had important shopping to get on with, and what could possibly be so wrong anyway? My final straw came when a woman basically pushed around me to peer at this poor lady being wheeled from the shop wrapped in blankets and announced loudly 'What's wrong with her then?' I really hope that none of them never had to suffer a horrible experience in such a public place and be treated like a sideshow for passersby.