What is the five second rule?

Answer 1

The five-second rule states that food dropped on the ground will be safe to eat and not covered in germs as long as it is picked up within 5 seconds of being dropped. This experiment will evaluate whether there is any truth to this theory.

Answer 2

When inbounding the ball, the team inbounding has five seconds to get the ball to a teammate. Should the inbounding team take longer than five seconds to do that, they turn the ball over to the other team.

well that, or dropping food on the floor, then picking it up before five seconds because people think that not a lot of germs are on the floor in 5 seconds.