You know when you have some fried chicken on your plate and it's the last piece at the cookout and of COURSE you drop it on the floor. Then what do you do? After all, it's disgusting to eat food that fell on the floor. Well, the 5 SECOND RULE says that after 5 seconds, any food that fell on the floor immediately becomes un-germified. So after 5 seconds, eat whatever you dropped on the floor, cuz the rule is what really matters.
John: "Damn I dropped my slice of pizza on the floor."
Mike: "That's too bad."
John: "Oh well," ::picks slice up and waits five seconds:: "5 second rule!" ::BITE!::