Revenge Forty Eight Hours : Season 11 Episode 2

If you've ever caught your mate cheating, dealt with a rude salesperson, or just had a parking space swiped, you've probably fantasized about the sublime joy of getting even. Maybe you've even experienced it. CBS News 48 Hours takes a look at this powerful emotion. Why is it so tempting? And how should you deal with the often-overwhelming desire to stick it to your fellow humans?