Castle: Tell me this why do you always have to be first? First out of the elevator, first through the door.
Beckett: Um, I am a cop. I'm the one with a gun. Being first through the door is my job.
Castle: In the elevator? Look, how about this? Would it kill ya'to let someone open the door for you once in a while?
Beckett: You do realize, if somebody opens the door for me, then I will be going through it first anyway, right?
Castle: Oh, yeah, that's right. I forgot. You have to be the smartest, too. Everything's a competition with you.