I know my mother got an AA in "laser electro-optics" back in the '80s and had a professor who worked on the program. He was of the opinion that the laser part, at least, would never work.
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"