This Great Cake Contest entry was submitted by KristiWalker123 from Knoxville, Tennessee: I carved lighting and sally from a basic loaf pan.
Use boxed cake mixes (substituting milk for water and adding 1/4 cup of sour cream) to make a 9 x 13 cake, and a cake out of a bread loaf pan.
Once the cakes have cooled, ice the 9 x 13 cake. Take the loaf pan cake, and carve it in the form of lighting and sally.
For McQueen's spoiler, use a piece of aluminum foil that is molded like the spoiler. Attach with buttercream icing, and decorate over it.