An epiphany derived from a mind altering substance, usually alcohol & more specifically tequila.
I was so wasted I couldn't walk straight but I had a tequilapiphany where I realized that woodchucks can't actuality chuck wood, contrary to popular belief.
The political principle where whether you go far left or far right, if you go too far in either direction, like Pac-Man, you will end up on the other side which is always a dictatorship.
Hitler was a socialist but moved so far left on government control that, because of the Pac-Man Principle, he came out on the right as a fascist and wound up ultimately as a dictator.