WIthout a question, the addition of Toy Story Midway Mania in 2008 has been a tremendous success for Disney's Hollywood Studios. Part of the reason for its success has to be attributed to the wonderful story telling that the Imagineers have included with not just the attraction but the "land" that the ride exists in, Pixar Place.
Imagineers conjured up a story that make the connection between Pixar Place and Toy Story Midway Mania make sense. After all, did you ever wonder why Pixar Place has been taken over by the characters from the Toy Story films?
Pixar Place is based on the architecture of the Pixar Animation Studios in Emeryville, California. Imagineers went as far as to exactly match the color of the brick and mortar from the original Pixar Studios building in the construction of Toy Story Midway Mania.
The story goes that Pixar Studios is the home of the Pixar films they've created, including Toy Story. Well, Andy has recieved for his birthday, the midway mania playset and when Andy leaves his house, the toys are so excited to play with the new set that they've busted out of not just Andy's room but out of the film and into the Pixar Studios itself.
Outside the building on the street we see the Green Army Men, which is only natural since they literally lead the way for the toys to make sure the coast is clear.