High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The five- second rule is a popular fiction regarding the eating of various objects that have fallen to the floor or ground. The origin of the rule is unknown. The substance of the rule is that if food falls on the ground, it may be safely eaten as long as it is picked up within five seconds. There are many variations on the rule. Sometimes the time limit is modified so that it is known variously as the "three-second rule", "seven-second rule", "thirty-second rule", and "ten-second rule", among others. In some variations, the person picking up the food arbitrarily extends the time limit based on the actual amount of time required to retrieve the food. This also can vary based on the surface on which the food was dropped. In Russia there exists a similar rule: "Promptly picked up is not considered fallen".

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