Ace, the mad bomber of the TARDIS crew, human Time Lord and unrepentant forever juvenile delinquent...

Just stands.

Shivering.

There's a hand on her shoulder, so she can't run, so she really, really doesn't know what to do next. Her brain, treacherous organ that it is, is still screaming the 'what ifs' that keep her from believing a word (or on Spoon's case, motion) that anyone offers.