In the form of used building materials, with some chance of flying body parts. Accumulation of victims expected to begin in the early evening. Dress accordingly.
More images from the wanton destruction of City Hall here: http://www.flickr.com/photos/dee_wells/sets/72157639102584604/
Also see Garnet’s set: http://www.flickr.com/photos/garnetpsaltery/sets/72157639101732974/with/11596366404/
((I hope you don’t mind, Garnet. Some great pictures :D))