The expression on Heather's face went through a slow progression as Rex spoke. He got a smile, to start with - little blue planet was pretty cute - but it progressed into wide-eyed horror as he kept speaking, culminating in her scrabbling frantically at the band of bright metal where flesh joined prosthetic until the leg fell to the ground. She very nearly fell too, balance throw off by the sudden loss of the thing's not-insignificant weight.

Once she righted herself she stared at it balefully. like if she had a spare foot to kick it with she would.