Also, arguably the song "Strange Things". Woody starts off playing with Andy and then suddenly Buzz is taking his place and Woody is staring around in shock at the way the room, and effectively his whole world, is changing so rapidly around him...
Really, it's pretty much an average younger brother/sister story. The sympathy likely goes out to the neglected older sibling (in this case Woody), but not to the point where it really becomes tearjerking.
Bo Peep watching Andy sleep without either of his favorite toys.
What really hurts is the fact that Bo and Slinky were the only ones who believed that Woody was innocent (until the arm scene.)