Because recent news items on plane evacuations, when the thing has literally been on fire, have reported that people will delay to collect their carry on luggag

Because recent news items on plane evacuations, when the thing has literally been on fire, have reported that people will delay to collect their carry on luggage despite it being strongly and explicitly forbidden. Therefore expecting Mr Tent to patiently wait by the window for everyone else to leave first seems like a bit of a stretch.