[tomswartz07]

Water has a mass of ~8.3 lbs per gallon.

A DC-10 Air Tanker carries 12,000 US gallons https://en.wikipedia.org/wiki/DC-10_Air_Tanker

All said, that's 45.4 metric tons.

Go ahead, stand under one and let us know how it goes.

[jimmaswell]

Here's somebody standing right under one.

https://www.youtube.com/watch?v=87hfWatbVPY

You people are all being ridiculous today.

[knowaveragejoe]

This video doesn't prove your point. Not only are they actually not directly under that, but this is spread over a much larger distance than trying to target the cathedral would be. They configure their release to spread over a larger area than that.