Mesh,
The point I was trying to make is that, sometimes, SOPs might contribute to confusion and maybe increase risk.
Moving on to your example:
"Just to finish, we had a situation in the cruise on a positioner with cc in the rear. The masks dropped as they were enjoying the film, No.1 walks forward to inform the flight deck, opens the door to find both FD with their O2 masks on. They turned around with looks of complete shock on their faces, the aircraft was depresurising, they were trying to get their O2 on and deal with the problem and then they have the incredible extra pressure of worrying that 20 cc in the back are starting to go into Hypoxia".
Aren't there some SOP actions missing here?
TC