An instance where two or more people realize a deep, profound connection between themselves that was not initially clear
Person 1: I happen to really love twisting Oreo cookies off, counter-clockwise, and then dipping them in a glass of milk at approx 40 degrees Fahrenheit
Person 2: Dude, no way! Me too since I've been 5 years old! Total radiohead moment just happened.
See also: the movie 'Identity'