Buddha left the Lei Yin Temple and went to the Heavenly Palace accompanied by two gods.Buddha used his great powers to stop Wu-k'ung's attack.The Monkey King angrily cried,"Who dares to stop me?" Buddha laughed and said,"I am Buddha of the Western Paradise."Wu-k'ung said,"I am Wu-k'ung,the Greatest Sage,conqueror of all heaven.I demand to be Emperor.""And what makes you think you are clever enough to be an emperor?"Wu-k'ung answered Buddha,"Everybody should have a chance to be emperor.I have mastered the seventy-two transformations,the ways of immortality and the somersault around the world.So,I am qualified to be emperor." Buddha asked,"But with all of your powers,can you jump out of the palm of my hand?If you can,I promise to let you be emperor.If not,you must leave heaven to further practice your skills."Wu-k'ung snickered and said to himself,"Buddha is so stupid.His palm is no more than nine inches long.Of course I can jump out."
"Will you keep your promise?"Wu-k'ung asked."Yes,of course,"replied Buddha.Buddha opened his right hand;it was the size of a lotus leaf.Wu-k'ung put his staff in his ear and leaped onto Buddha's palm,saying confidently,"Here I go!"
 He somersaulted again and again until he came to pive pink columns which reached to the sky.A cloud of smoke hovered over the columns."I must have reached the end of the universe.The Heavenly Palace will be mine when I return,"thought Wu-k'ung. "Before I go,I must leave some marks to show Buddha how far I have come,"he thought.At that he pulled out a hair and turned it into a pen.On the center column he wrote,"The Greatest Sage has been here."
After that,he urinated on the first column and then somersaulted back to the starting place.he shouted,"Now that I have come back from the end of the universe,please turn the Heavenly Palace over to me." Buddha scolded,"You little stinker.You haven't jumped out of my palm.Look down."When Wu-k'ung lowered his head,he found that on the middle finger of Buddha was the line of words which he had just written.And from the fingers came the powerful smell of monkey urine. Wu-k'ung was shocked."What happened?I must try again!"He was just about to jump when Buddha turned his palm over and pushed Wu-k'ung out of the gate of West Heaven.

Question: What's wrong with WuKong's seeing from Buddha's palm?

Buddha's five fingers now turned into five mountains of gold,wood,water,fire and earth,which together were called the "Five-Element Mountain."Where the mountains met the Earth Wu-k'ung was held prisoner. Buddha bid farewell to the Jade Emperor and stepped outside the gates of West Heaven.He called the god of Earth and other gods to guard the monkey and told them to give Wu-k'ung pills of iron to eat and juice of copper to drink.Buddha explained that when Wu-k'ung had suffered enough,someone would come along to rescue him. Pictures and texts are from http://www.china-on-site.com