A modern passenger jet suddenly encounters some very turbulent air. The captain, who was just enjoying his toilet break, rushes back into the cockpit. Just as he's about to sit down the plane drops, causing him to hit his head on the overhead panel, accidentally pressing some buttons with it. Oops...
Does this happen and how is the potential impact mitigated?
Are the buttons in the cockpit designed to withstand accidental activation from such uncontrolled movements? Do they activate instantaneously or require prolonged pressure?
If activated immediately, what are the most dangerous buttons, and do the pilots have enough time to assess what happened and undo some of the changes before they present a real danger?
What about other types of accidental inputs? For instance, a pilot stumbling and inadvertently interacting with the center console controls, or any other plausible scenario that has either occurred in the past or could reasonably transpire in the future. How are these potential incidents managed within the cockpit's design?