a proper oxygen mask independant of the aircrafft. I know the cockpit crew do
Cockpit crew have no assigned duties in the cabin during a decompression.
I think he's talking about having an independent oxygen bottle and mask in the cockpit. This is usually the case.
The tarts (as they were
affectionately referred to where I used to fly) are trained in the event of a decompression to sit down and do nothing, a procedure not always easily distinguishable from day to day operations.
If they walk across the cabin to get an O2 cylinder and mask from a stowage, they might get all light-headed and pass out. This is even more likely during a depressurisation.