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Something like this on a much, much larger scale.

> ""We also know that the velocity of the water flow must have been more than 300 kilometres an hour."

I'm not sure how to visualize this.

I feel like the friction against the air would be enough to cause tornadoes.

A snow avalanche is probably the closest thing you can see today.

Try to find one where it hits trees and see what it does to them, otherwise it's hard to really see the scale and force.

Imagine a big ass river. Pretty much the same concept, but in reverse.

It is an incredible thing to think about!