Evidently this guy has never heard of the "Collapsing Cola Can Trick," which you can try in the next few minutes in the safety and comfort of your own home.Originally Posted by Superluminal
Simply empty a can of cola. Ensure there are no dents in the edges. Grab a pencil.
While wearing tennis shoes, carefully stand on the can until all your weight's on the can and you're balanced.
Now rap the side of the can sharply with the pencil.
WHAM! The can collapses, the stresses of the collapsing area where you tapped it rapidly propogating around the can until the entire circumferencial supporting structure fails all at once.
It doesn't topple over.
As for the multiple explosions and puffs of smoke, all characteristics of collapsing buildings, whether charges were used or not.
In Seoul, Korea, there was a multi-floored shopping building which collapsed a couple decades ago, killing hundreds of people. Many people reported hearing a rapid series of explosions, but it was simply snapping and buckling columns, beams, floors, etc.
Back to the cola can trick - what did you hear as it collapsed?
My point exactly.
If you were listening carefully, you hear an initial CRACK followed by a very quick CRUNCH. The CRACK was the failure of the material propogating around the circumference of the can, and the CRUNCH was the remainder of the can as it was smooshed beneath your weight.