Got a question about the Extreme Make over...?

ok, so i was just watching "Extreme Makeover: Home Edition" %26amp; they where knocking the house down completely w/ the tractor thing. but as they were doing it, they were spraying water continuously on the building tht they were knocking dwn. just have a curiosity of why that is...so, what do they do tht for?|||I think that it is just to make sure that nothing coming down is flammable to avoid anything catching on fire, or, as the other person said, maybe to keep the dust down for surrounding properties.|||To keep the dust down and just in case when they are doing that nothing will catch fire.|||It makes the wood softer and easier to knock down.|||trying to keep the dust down.