Clara Oswin Oswald and The Doctor in “The Snowmen”

Why are you showing me all this?

You followed me, remember. I didn't invite you.

You're nearly a foot taller than I am. You could have reached the ladder without this. [She indicates the umbrella held in her hand] You took it. For me. [She throws him the umbrella] Why?

I never know why. I only know who. [He conjures a TARDIS key up and places it in her hand]