Say you've dropped a sweet on the floor so your friend shouts “Quick! Pick it up! 3 second rule!” Because apparently if you drop food on the floor, you have three mighty seconds to rescue it and it will still be pure and untouched by bacteria as it was before you dropped it.
Food dropped onto any contaminated surface, in this case the floor, has the potential to cause food poisoning and many other problems nobody wants and it was found that at least 20,000 UK residents seek hospital treatment for contaminated food case, a year, which could have been easily avoided.
It has also been scientifically proven that the 3-second rule or 5-second rule doesn’t exist and it is safer to just throw away whatever food you dropped on the floor. Better to be safe than sorry.