...until the seatbelt signs go off and The Pack makes a rush for the toilets...
That for me is one of the last great mysteries. No matter how much time people have spent in the terminal building/lounges with plenty of access to bathrooms, once the seat belt signs go, there is
always a handful of passengers dashing for the toilets immediately...
Another thing. Arriving at the gate 15 minutes late only having to further delay departure because there are still people showing up at the last minute, usually with two duty free bags plus the odd coffee/big mac in their hands is usually quite annoying. I has always amazed me that in the case of a delayed inbound aircraft, still the odd passenger on the next flight almost manages (and often
does manage) to miss it, even though you would expect them to be standing ready to board at once by that time...