Mel shrugs.

"It shrank with me, though," she says, holding it up to show.

But - because Rachel's big and this would be awkward, she takes a cookie bite while the demorphing process is going on.

"Wragh!"

She balloons up in all directions, staggering again with the disorienting feeling of throwing up through her limbs.

When she stops, she looks down at her arms.

"How do I know if this is the same height I started?"