Girtbar its good to see that you are safety conscious and I am not sure of the procedures onboard a 737.But what happens when the purser commences their cabin secure(if they do the demo from row 1) and they get to row 15 or wherever the other crew member did their demo from and an accident happened then? who is covering doors 1? on the 757 operating min crew is similar where the senior who is responsible for doors 4 commences their demo 10 rows away at doors 3.This procedure is perfectly normal for different carriers and a/c types and has been for years.CAA checks are carried out quite frequently amongst UK carriers aswell as sep manuals being approved including sops.I think it comes down to probabilities.....If a pax is being resucitated in the cabin for landing...would you leave them to cover your door INCASE of an evacuation?? I know I wouldn't.
