They tried to implode 4-5 storey buildings but after the 4th attempt only 1 wing of 1 building actually fell. Sometime during the 5th attempt 2 buildings fell but they pitched a hunk of concrete the size of a small car into the crowd. I have to run to a prebid but I will post the video later. It's kind of interesting in a perverse sort of way. In the meantime here is another article about it.

http://in.news.yahoo.com/070512/48/6fpkt.html