There's nothing you can do. If you can even see the flaps, you are so far back you can't do anything. You will be brought down by sky marshalls or cabin crew if you make a run for it. The pilots probably won't even hear you. They may not even abandon the take off even if you can get that far in the time available. I suggest tighten your seat belt and stop trying to monitor everything and enjoy your trip- that's what aviation is supposed to be about. We have a peculiar failure here of a back up monitoring/alert system. 2 separate failures together caused the accident. That is where the cure is, not in 180 people all trying to check the flaps are out before takeoff!