The old theory held that you had a five-second grace period before bacteria got their grubby little mitts on the food you dropped on the floor.
Until earlier this week, I always thought that Rob McKittrick‘sWaiting offered the funniest and most accurate depiction of the 5-second rule in real life. (Skip to the 40-second mark on the clip above.) Then came SF Weekly‘s handy and hilarious You Dropped Food on the Floor/Do You Eat It? chart: