“It’s all tax deductible
We’re evil and corruptible
While sailing on the Wide Accountant Sea!” 
Here’s another one said to be from yesterday.
Ope.
https://www.reddit.com/r/CatastrophicFailure/comments/1bh06cd/container_ship_crashes_into_cranes_at_a_dock_in/
The video there has been pulled, but based on the description, I think it’s this one on YouTube:
Yes, that was it, though yours is better. The one I posted only had the first clip from across the water. I wonder why they took it down.
This is known as enfilade firing. It has a far greater change of hitting things, although originally intended for use against troops on the battle field.
Landlubber! At sea it’s called raking fire.
Blasphemy! When you get your skyscrapers to float then we’ll rake 'em, by gum.
Use a mortar ball and fill it with jet fuel.
< runs away >
One way is to cut the beams with a torch to weaken them, then induce a load like a side load with chains to pull the building down in a controlled way. Another is to erect temporary beams that can be taken down in a controlled fashion, then cut the steel beams. Yet another method used in Japan is to put the whole building on jacks, then dismantle it one floor at a time, resetting the jacks each time…
Cutting steel beams isn’t the problem. The problem as I understand it is that the beams bend and buckle when the building is coming down, which can cause it to come down in unexpected ways.