Thank you for the feedback! You actually got a very rare event in wich the impostors twitch their heads and limbs! They are supposed to only do that in a 0.1% chance.
There are behaviours during lights on and off that if you pay attention and sort of memorize the movements that are more constant, you can find the imostors, tho it's not the best or recommended way cus there are also movements for the innocent that might happen once in a while differently.🎭