Walmart needs a new worker in an important position...

So they're looking for the smartest person they can find. After months of elimination, they've come up with 4 people. So, they decide that they will ask a question and the person who comes up with the best answer will get the job.

They call up the first person and ask him: "What is the fastest thing in the world?" After a few minutes of thought, the man says, "The fastest thing in the world is a blink. Without doing anything, you just blink. You never even notice it!" The interviewers take his answer and call up the next person. They ask her the same question and after a few minutes of thought, she says, "The fastest thing in the world is a thought. In order to do anything, you must first think!" They take her answer and call the third person. They ask her the same question. After a few moments of thought, she answers, "The fastest thing in the world is light! Whenever I flick a light switch, before I can think or blink, the light is there!" They accept her answer, knowing that it must be the correct answer. However, they agree that they should allow the fourth person a chance to answer. So they ask him in. They ask him the question and after a few minutes of thought, he says, "The fastest thing in the world is diarrhea! When I have it and I rush to the bathroom, before I can blink, think, or turn the lights on, I've pooped my pants!"