I flew into Conington a few months ago in the Koliber (
). I landed, taxied into the parking area and turned the aircraft so that she was tail-on to a parking space. Then I jumped out, (yes, I did stop the engine first ) towbar in hand, ready to push her back.
This is something we did after every flight and I was quite used to doing by myself, but a chap came hurrying over to help me. Without asking, he put his hands on the retractable leading edge slats and and was about to start pushing when I shouted at him to "kindly desist, please! "
He had actually put his hands each side of the black stenciled marking on the slats which clearly read
DO NOT PUSH.
(The reason for not pushing on one of the slats is that they move together, pushing on just one of them may distort the linkage leading to asymetic slat deployment and an incommanded roll etc, when you are slowing down nicely on finals or just about to touch down. If they must be retracted, they must be moved together.)