Feal Effect "Flea Effect" arises from a interesting experiment. A biologist thrown the flea to the ground freely. The flea can jump more than one metre from the ground. But if you put a cover in a metre high, It will jump immeditely and collide with the cover. It will repeatedly collide with the cover. After several times, You take a way the cover. You will discover though It also is jumping. But It can't reach that height until It dead. It tell us we must have a higher objective if you wish you can success.