Now this is cool: a video of yesterday’s controlled demolition of the Landmark Tower, a 30-story skyscraper in downtown Dallas that is one of the tallest buildings ever imploded. According to a description that accompanies the Star-Telegram’s simulation of the implosion, a 20-foot trench was dug at a corner of the lot, and the tower was purposely brought down with a slight lean so that it would fall both into its own basement and into the trench. Pretty damn keen.