What kind of a mother is that?
What's up with the mom? How come she doesn't say anything when she notices all the weird things that her son is doing.
She doesn't say anything or attempt to discipline him when he states "I feel pretty damn good." I certainly would have been slapped if I had used that kind of language at that age.
Then, later in the movie when he takes the two of them to school in his waist pouch and is walking weird and slow, (a) she doesn't ask what he's doing or why, and (b) she doesn't yell at him or demand that he hurries even after the school bell rings.
I can't think of any other examples off the top of my head, but I do remember noticing more situations like that throughout the movie where any normal parent would have asked questions.