5. Riots!
I always imagined myself to be the one busting windows out of the convenience store and stealing as many cartons of Pall Mall Menthol cigarettes as possible. Really sticking it to the man, right? Honestly, though, once we figure out that the law system has gone, it would take the literal end of the world to stop us from pillaging. Money would no longer be our currency. Strength and stealth is our new currency. You can have whatever you want as long as you are faster and smarter than the guy on the other side of the store. If you haven't realized already, things escalate very quickly among groups of heated human beings. Whether it's in celebration, mourning, outrage, whatever, a fight will turn into a riot which will turn into arson which will turn into murder and destruction. Which is only scary in the aftermath. Which means it would be awesome at the World's end, because there would be no aftermath. The only aftermath would be the total disintegration of civilization as we know it. If you want to destroy a mailbox with a baseball bat? Do it. No one's getting any mail. Drive a car into a building? Go ahead. We will be allowed and even encouraged by our fellow doomed peers to do whatever our hearts' desire. Anything you have ever wanted to do will be possible. Even something as dangerous as playing with chemicals in a lab or driving a bus without a commercial license. Of course, I could say a lot worse things, but in light of recent events, I will allow your mind to fill in the gaps.