I actually thought it would be a good idea to "practice" when we were in an
air/flight museum and they had a plane open for walking around in all the
parts. Well, I got in trouble with the museum guard. Hey, I was a
youngster at the time.

Question though - if there is too much pressure or handle is "locked" when
in flight - then how would it work to open the door if there is an emergency?
Or, does the emergency landing somehow undo the the lock? (I can see
how being on Earth would in fact make the pressure differential negligible if
that were the problem).

--LG