Why did they park the spray helicopter on top of the truck?
There is a lot of them about.
WAW had one back in 1979, an idea brought from England.
The can be operated from a farm track or in the middle of a forest. Water was always at the loading site, no hoses and no pumps to drag around. An extra bonus was the loader was well below the working helicopter, well away from the blades and other moving bits. These days in the H & S world, it ticks all the boxes.