The cat who wanted to jump high

There once was a cat who wanted to jump high. All of the other members of his family could jump on the the top of a sky scraper. After they are on the top, they jump back down and half way. A parachute opened up and landed down safely. But the cat could only jump to the 3rd floor window. So he got 20 springs and ran and jumped on the springs and landed on the 20th floor window. Next, he asked his family members to come down to carry him to the roof.