This thread reminds me of the CR9s F Lav door. They pop out every once in a while and although they are nice to have, they don't really impact anything to do with the airworthiness of an aircraft. I honestly wonder what the pilots did if they answered that call on the takeoff roll. I can't envision a panel falling out until close to rotation at which point by the time the pilots answered the call the plane was probably already starting to lift off.