I don't think you can truely answer this question with 100% confidence. There are things you would LIKE to do, but until you are put in that situation there is no way to tell how you would react. As for me, I would hope I would form a group with my friends and try and find a way out of the situation together. If not, at the very least sacrifice myself for them. Still, my instincts might kick in and I turn into a survivalist animal and kill everything that moves. Again, you will probably never know unless you are put into a situation like that.