The boys packed bags to go to Aunt Amie's tomorrow.  Henry packed a modest backpack while Walter packed an over sized grocery bag.  He filled it with plastic animals, mostly dinosaurs, and hiked the straps of the bag up on his shoulder.  As he did this, the weight of the back shifted behind him turning Walter all the way around and knocking him down.  He then agreed that maybe he had packed too much and took out 3 toys....