How did this nightmare come true?

Clara: Doctor?! Though I appreciate a well timed materialisation as much as the next girl. Why, I mean why, was it necessary in the first place?! Why is the Skovox back at school?

Doctor: Attracted to the amount or artron energy left over the years around Coal Hill.

Clara: But why did it blast me?!

Doctor: Best guess absorbing the artrons on you from travelling through time.

Clara: Yes, but...my clothes?

Doctor: Another guess, only vaporises inorganic matter. Fascinating.

Clara: No! Not Fascinating Doctor! I am naked!!!

Doctor: It's a very bold choice for you.

Clara: NO!!! Not a choice! Very much not a choice! I left the house this morning, very much dressed...oh my god I was naked! In front of my students!

Doctor: *staring at the Tardis scanner* Wonder where it vanished to, teleport? Maybe time travel?

Clara: I'm never gonna live this down, I'm never gonna be able to teach again, naked...in school. This is a nightmare...but real this time.

At the door of the Tardis, golden energy appeared, like a tear in the skin of reality and out of it emerged the Skovox Blitzer.

Doctor: Clara! Get away from it!

Clara: What?! How did it get in the Tardis?!

Doctor: Artron energy, didn't I say.

The Skovox Blitzer locked an energy weapon on the console, a blinding light engulfed the room.

Clara with her hand on the console.

Clara: DOCTOR!!!