When a song becomes so iconic, it can be identified by the first few notes alone.
Named after the song "MEGALOVANIA" by Toby Fox.
Person 1: Hey, check out this song I can play on the piano.
Person 2: Okay.
*Person 1 plays the first notes of Never Gonna Give You Up*
Person 2: That's a MEGALOVANIA Effect if I've ever seen one. Goddammit.