Water-arch opens emergency exit hatch and deploys an overwing slide.
The Airbus A320 is fitted with two overwing exits on either side of the plane. To activate the exit from outside, you have to push a panel on the control lever and then exert pressure to force the control handle up and outwards.
When the water spray hit the side of the aircraft, the force of the water not only managed to push the panel on the control handle inwards, but it also forced the control lever up and out. Thus, the slide was instantly activated.
Cause: malfunction of a water turret (водяная турель/ ствол)
