How the hell do you manage to get the door open in a PA28 by accident?
Dunno how but it happened to me and a mate on a jolly out of Wellesbourne. A quick circuit, land, onto the taxiway check the latches reshut the door and off to go again. Probably hadn't got the latch properly engaged first time round.
I seem to recall that you can steer a C150 by opening and closing the doors and you can use the windows on some as an ASI by seeing how far up they hang in the airflow when opened.
Once at old Sarum I was about to go up for a revalidation flight in a C150 when I was informed there would be a slight delay as the student before me had pulled the door jetison lever instead of the handle. Wait one for a large magnet to find the safety spring clip in the grass!
