Mittens tried to change his costume and....

Mittens was so horrified that all he had for a costume was a mask and all the others were going all out on their costumes, that he decided to go seeking for a new costume that would wipe the others right out.  He searched in the bedrooms and under the beds.  He searched in the closets and under the towels.  He searched in the bathtub and behind the toilet.  He searched in the kitchen and.....oh, what did he find there?  He found the scariest pumpkins in the world.  Just look....oh, don't mind the sweater, Mittens was cold so he donned a sweater to stay warm as he searched.....

Pumpkin image by PublicDomainPictures
Mittens was added after the fact  LOL