The cow jumped over the moon because he wanted to see the cows that gave the milch to make it into it's green cheese state. He jumped that high because, well, he was trying to see the moon. On the other side of the road was a "Save the chickens. Eat pigeons." convention and he wanted to join.
O00hhh those are EASAYYY questions! 1. the cow jumped over the moon because it wanted the pie on the other side of it. 2. the cow could jump that high because it was ACTUALLY clark kent and it wasn't jumping, it was flying 3. there was some awesomescauce pickles on the other side of the road :)
1. so as to deliver cow's milk. 2. cow's actually flying via air flight delivery schedule running out of time. 3. because the chicken was shocked to see the cow flying and the chicken make believe 'if Du can fly, i can walk either...'