
In San Francisco, when the Walls are living in a house they rented, Jeannette is having trouble going to sleep because she is scared of a monster that might be under her bed. While helping her “monster hunt”, Rex calls her mountain goat, and this shows us that Jeannette just might be his favourite child since he only gave her a nickname and not the rest of the kids. The nickname symbolizes Jeannette’s endurance in the face of trouble; like a mountain goat, she is good at climbing mountains without losing her footing. She has the motivation to keep going and never give up.