Dr. Cameron: It could be ALS.
Dr. Foreman: He's too young for that.
Dr. Cameron: Some type of muscular dystrophy?
Dr. Foreman: He's too old for that.
House: So what would be just right, Goldilocks?
This is a reference to the childrens' story Goldilocks and the Three Bears. Goldilocks tries to eat the potage and one is too hot, one it too cold, and one is just right. She also does the same thing with the beds in the bear's home one is too big, one too small, and one just right.