There was a farmer in North America .one day , When he was coming back after work ,he felt smell of crude oil.This crude oil in his own field and Now he became rich.He decided to go town and he bought Porsche.The car speed was slow and uniform .The reason behind this, the car was pulling by two horses not by car engine which is 370 h.p. Same as that farmer car has high capacity of but he was pulling car by two horse and So we have lot of potential and we must to know it.