Is there a law .....?

Had to change a ballast in a T8 fixture at work last night. About 25ft up on scissor lift. I usually try to get the lift under what I am working on so it can catch anything that falls (usually just wire insulation I strip off or an occasional wire nut.
Where this light was located,, best I could do is get close along side of it. Only one screw in it that holds the ballast. Of course I dropped it. Watched it do Plinko off a couple things on the way down. Thought I knew pretty close where it was. Nope. Found 6 other screws, but not the one I dropped. LOL