[ Clara has never in her life watched someone do something that terrifies her so much. Which is saying a lot, considering the things she's seen and done. It makes her understand the Doctor worrying about humans and their fragility.

When the leap is made and Caitlyn looks like she's about to fall, Clara shouts in terror, and then, when the immediate danger passes, she feels like she might throw up right over the edge. That was the most harrowing thing she's witnessed, and she calls out urgently. ]

Caitlyn! Are you okay? If your heart gives out after you survived the jump, I'm gonna be so mad at you.

[ She's trying for a joke as she calls across, the distance seeming even greater now that Caitlyn's cleared it with her much longer legs. Now, she has to figure out what to do with the rope and how best to get across. ]

Is it stable-ish at least?