Ming: Klytus, I'm bored. What plaything can you offer me today?
Klytus: An obscure body in the S-K system. The inhabitants refer to it as the planet...Earth.
Ming: How peaceful it looks...[Causes an earthquake.]
Klytus: Most effective, Your Majesty. Will you destroy this...ah...Earth?
Ming: Later. I like to play with things a while, before annihilation. - Flash Gordon (1980)
A schroedinbug is a bug that manifests only after someone reading source code or using the program in an unusual way notices that it never should have worked in the first place, at which point the program promptly stops working for everybody until fixed.