A long time ago, when I was a newbie copilot, it was drilled into me for handing powerplant/wheels/flaps controls: "(name control) Identified " (as pilot handling engine controls puts hand on that control knob) "Confirmed" (pilot monitoring says) then the pilot handling operates the control. Is it still done this way?
June 2019 in Canada, the PNF pulled the condition levers to shutdown on a cargo Basler DC-3T by mistake, and you have to pull them past a gate to do it! Splashed the plane.