@LiquidFeet asked about remotely triggering an avalanche.
Several people gave good explanations.
The one I visualize it is "speed dominoes' where people layout an entire room full of dominoes upright, and after tapping one, at the end, the whole thing collapses. The dominoes are the weak layer, and the if there is a book sitting on top of those dominoes, on the flat, it will just "whoompf", down an inch. But if there is another book resting on dominoes on stairs, will come sliding down.
Anyway, here are two great videos discussing avalanches triggered remotely from low angle terrain:
Several people gave good explanations.
The one I visualize it is "speed dominoes' where people layout an entire room full of dominoes upright, and after tapping one, at the end, the whole thing collapses. The dominoes are the weak layer, and the if there is a book sitting on top of those dominoes, on the flat, it will just "whoompf", down an inch. But if there is another book resting on dominoes on stairs, will come sliding down.
Anyway, here are two great videos discussing avalanches triggered remotely from low angle terrain: