Holiday Reading - Rewriting the End

The title of the book I read was Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space ( and the subsequent assault of the equally evil lunchroom zombie nerds ). The author to the story was Dav Pilkey. This book is an adventure book.  

The story ended with Captain Underpants, George Beard and Harold Hutchins blowing up the 3 aliens and their spaceship.

I would change the story with the 3 aliens stepping on a disguised block of grass and then sprung up into the sky never to be found again. Then the school used the empty, unusable spaceship as an object in the playground.  

I think my ending of the story is better because they don't have to waste time writing the names of extra, random potions. George and Harold can make it more like a prank seeing that they like to do a lot of pranks.