Here's something to think about, this is a French demolition technique known as Vérinage; it is performed without explosives. Hydraulics are used to push structural members out of alignment allowing the top portion of a building to then demolish the structure below via gravity alone.
I won't post my thoughts of how this compares with what we witnessed on September 11th, I'll leave this open for your opinions one way or the other
Keep it clean and try to give an unbiased opinion based on what you see