I have seen a bunch of chimney and building demolition videos on youtube and what I typically see is that whenever they bring down a building with explosives especially in urban areas they make the structural elements cut in such a way as for the building to fall in its own footprint and the building usually fall into their own footprint happily , even on 9/11 the structure of the Wtc fell through itself due to the large mass of the upper floors and the specific design of the building. (i'm not saying twin towers were blown up as they were not , just making this clear due to the large tin foil hat community around these days) Whenever I see a reinforced concrete chimney being blown up I almost always see the chimney fall to the side in other words they blow it up at one side of the base and let the gravity top the chimney over and then it falls but almost never have I seen a reinforced concrete chimney being brought down vertically in its own footprint. I wonder why is that ? I would like to make my own attempt at explanation which was the idea that came to my mind. A building is usually rather heavy with respect to the structural strength of its load bearing core or elements while a chimney being almost always circular in shape and built from reinforced concrete is very light with respect to its own structural strength and because of this if it were to lose a part of its base and fall vertically it would slow down after a while and come to a stop because its strength is higher than its own gravity powered acceleration force to crush itself so it doesn’t do that. Here is a link to a videos where I think it can be observed. Am I correct or no ? P.S. I wonder whether the wtc twin towers would still be standing in they had some tubular and tich reinforced concrete cores as most of the newer higher skyscrapers have instead of a lightweight structural steel core and outer walls.