The file
Seven ingredients in a specific order, said as fast as you can. The 1974 campaign turned the recipe into a tongue-twister and restaurants ran promotions where reciting it in under four seconds got you the burger free.
It came back in the 2000s for a new generation, but the original is the one older Gen X can still do in a single breath, sesame-seed bun and all. Say it with your eyes closed and you're in 1975.
Sources: Wikipedia — Big Mac
