<iframe src="http://www.youtube.com/embed/se5kWgtB2Qg" allowfullscreen="" frameborder="0" height="315" width="560"></iframe>
By our count, the 126-second-long multiplayer trailer for Assassin's Creed: Revelations posted above features 30 individual murders, giving it a murder-to-time ratio of one murder every 4.2 seconds. If that sounds upsetting, you probably shouldn't click that button with the sideways triangle on it.
Source