Boor buggers, probably never waterbucketed to a spot that small before. They should have spent some time practicing prior to the demo.
Worst I saw was a Forest service demonstration on foam-additives. A buddy was using a 206 as the demo aircraft, he got a Bambi filled with water and the foam additive. He hovered 100' high in front of a large crowd for the drop.
Then He dropped everything, the line, the Bambi, everything - SPLAT ! (oops, finger trouble?)
The Bambi actually did well, not too much damage. He told me afterwards " I just wanted to fly away and go home...."