You must kill the person below you, but here's the catch. You must do it creatively.
Ready....GO!
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I'm nice. I sucker punch you in the face "knockout game" style breaking your tooth. You have to see a dentist, and they knock you out with some gas. I shoot everyone in the dentists office with tranq darts. Then I mess with the gas turning off the oxygen and I have you breathing pure nitrous oxide. You smile as you suffocate and have a happy dream as you die.