Re: Washing down : Water descending from above

I guess the do not do it at all is the most pragmatic solution.

See man accused of throwing rubbish bin off balcony.

https://www.abc.net.au/news/2015-10-05/bin-throw-accused-william-jack-greenway-bailed-darwin/6828760

While the degree of harm may be less for a thrown cigarette butt, or a sluiced bucket of water, the principle is the same.

Hopefully the doonas do not descend from the balcony.