You all have seen videos of large buildings being destroyed.  They go boom and collapse in on themselves creating a lot of noise and dust and leaving a pile of debris.  What do you do when there are other buildings directly next to your skyscraper?  Leave it to Japan to come up with an answer.  You take it apart one floor at a time:

[youtube http://www.youtube.com/watch?v=8_4G_8gEjng&feature=youtube_gdata_player]