Ten gives Sexy a look of - 'it's going to happen one day'. Almost happened with the Dalek Emperor in his leather jacket face. As Ten gently fingers with her fingers.

Which Ten then eyes Sexy; but those aren't cute puppy brown eyes; those are hard and feeling of having lived too long eyes.

Falling out of the sky you say - that means he'll have to regenerate doesn't it? There's a brief moment when Six was lasered down from The Rani in the Tardis and had to regenerate.

Which Ten, swallows hard and starts to cry silently and hides his head between his legs.

That means he really doesn't see Rose again.