Back when DC-10s had a series of door related issues, climbing out from IAD, the entry door started to whistle as the pressure differential increased. Flight attendant at the nearby jump seat started to yell at those of us sitting in the front few rows of economy to move QUICKLY to the back of the plane ! I demurred, thinking that I would be better in my seat with my belt tightly buckled! Before we could discuss further, there was a loud "THUNK" as the door in finally seemed to seal properly. My neighbors came back to their seats. and n we went to LAX without any further incident..