How much outlaw is in you, really?

I have a few catastrophe movies in my library; the origonal Towering Inferno, two called Meteor, The Day after Tomorrow are perfect examples relating to this question.
If a major disaster struck, and all around you is chaos, to what degree would you stick to the laws you now know? Would you ditch all rules except survival of self? Would you kill? Steal? Would you cause no harm intentionally, but ignore others to find safety? Be as honest as you can, given the hypothetical nature.