Uh, brain fade. It's the mosquito TRUCK, isn't it. Which, thankfully, hasn't been around this year yet, either.
The spray rig is pretty clearly visible on the underside of the plane. Before I knew what they were doing, I stood on the upstairs porch and watched them go directly over my house, maybe 100 feet up at most. That close, it was really easy to see all the external plumbing.