“I’m on it.”
Bio
One of my favorite parts of Inception starts with Arthur comforting Ariadne after Mal stabs her awake, continues with his "Oh, I see you've met Mrs. Cobb," and ends with Ariadne telling him, "I don't know if you can't see what's going on or if you just don't want to, but Cobb has some serious problems that he's tried to bury down there."
Another favorite part is Arthur asking Ariadne, "Why would you put a train crossing in the middle of a downtown intersection?" then Cobb pointing and yelling at Arthur for missing the militarization, changing the subject away from the train.

