Doors must be popping open quite regularly, and here's just one example.
I was once backseating an instructional flight where the student was on his first time in a Longranger for a type endorsement. Just before reaching circuit height his (right) door popped open. The left-seated instructor immediately took over the controls and the student had to slam the door back with both hands several times before it could be shut and latched properly. No simple feat as the front doors of a Longie are quite heavy and the slipstream wasn't making it easy for him.