Hmm many people have the concept in their mind that demolishing building with explosives is blowing it up. Thats wrong.

The explosives is to destroy the supports, therefore gravity will then force the building to come down. Just like someone using a rifle and shooting at ur knee. You will fall sideways once ur leg is shot. However the process is extremely complicated and expensive and dangerous.
There was once in Australia an old hospital was being imploded. The engineers used to much explosives. The explosives blew huge chunks of debris into the crowds who are watching in a distance. One girl was killed, many others injured.
Hence implosion was not used, and this method was used instead.
In the past, excavators and cranes arent so modern compared to now. Last time they used wrecking ball to demolish buildings. I witnessed one before when the factory opposite where i was living was being torn down. That was during 1995 or 1996. I was living in Hillview Avenue HDB then. Now even the HDB got torn down as well. *sigh*
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