Flying all night over a plantation to prevent frost on Florida orange trees?
My most unusual flight was a mercy mission for a Killer Whale. A landslide took out the power to Ocean Park which stopped the filtration and cooling plant. We were tasked to deliver an underslung 6,000lb generator to the road just below the whale's pool on an 80 ft strop. As I brought the aircraft to the hover, the whale came up out of the water, leaned on the edge of his pool and looked me straight in the eye from just outside the rotor disc! I'm sure he winked at us...
The flying circular saw takes some beating though.