Passenger opens plane emergency exit thinking it was the toilet

[The Velveteen Ocelot]

10. PIA doesn't fly 737s (they mostly have 777s). The overwing emergency exits on most aircraft

are plug-type doors which have to be physically removed and are very heavy, which is one reason the FAs try to seat "able-bodied" passengers in the exit rows. Those doors can't be opened when the airplane is pressurized because the way they are seated in the window frame makes them effectively bigger on the inside than on the outside (even the 737 door in the photo is a semi-plug door, which is held closed in part by the air pressure differential in flight). This incident seems to have involved the normal passenger entry/exit door, which is often not far from the lav door, and when armed for takeoff becomes an emergency door because if it's opened the slide deploys. But it can't be opened in flight either.