[Unhappy with Keith as a chemistry lab partner, Natalie speaks to the teacher]
Mr. Miles: Keith is actually pretty sharp when he applies himself.
Natalie: Okay, but we kinda...
Mr. Miles: ...lack Chemistry?
Natalie: Yeah.
Mr. Miles: Try to make it work, okay?
[Natalie heads to the door. She just gets to it when Keith appears before the teacher as well]
Keith: About this Natalie Anderson thing: Walter, she's a complete anal-compulsive control freak. How do you expect me to work with that?