Hwel, I hardly think that's an excuse for everybody to do their own thing, do you?
RBF, I have to concur with other posts here. If you take it upon your own head to do anything without orders from the captain, he is perfectly entitled to have anyone on board lay you out and, if necessary, use what is left of your body as a ramp for others to climb over.
Do your own thing based on no information at all and you are DANGEROUS. You will endanger not only your life (which the remainder on board will have few problems with) but also the lives of everyone else.
You have no idea at all why an evacuation might not have been ordered, even assuming there is a danger. You do your own thing and all you will achieve is unnecessary deaths through your own selfishness.