I believe those over wing exits are locked through an electric circuit and can only be opened once the flight deck (or cabin crew?) removes power to the lock, or power is disrupted (crash). So is it not part of the process that for the over wing exits to be opened the crew had to activate the de-lock device? (or when the LH engine was shut down power to the lock was automatically disrupted). Am I missing something or is it possible to open the over wing exit under some other method?