"Accompanied by six graphs, two tables and equations whose terms include 'bologna' and 'carpet,' [a scientific paper from Clemson University] is a thorough microbiological study of the five-second rule: the idea that if you pick up a dropped piece of food before you can count to five, it’s O.K. to eat it."
After watching a clip of Meryl Streep playing Julia Child in "Julie and Julia" (2009) where she fails to flip an omelet properly in a frying pan, "That is the origin of the five-second rule."