There’s a scene in the animated series Futurama that cracks me up every time I think about it.

The show’s characters are at the horse track of the future, but there’s controversy when a race ends very, very closely — so closely that the race officials need a powerful electron microscope to judge the “photo finish.” The track loudspeaker eventually announces, “And the winner is … Number Three, in a quantum finish!”

And Professor Farnsworth, who had bet on the other horse, tears up his tickets in a rage and yells, “No fair! You changed the outcome by measuring it!”

Didn’t get the joke? Don’t worry, neither did most of the viewers.