Sam didn't have to think about it for very long. He excitedly typed his fantasy into the Chronivac, grinning at his fingers flying over the keys and knowing that they would soon be toes. Biting his lip, he pressed enter.
Immediately, he felt a strange tingling in both hands, and held them up in front of his face to watch them change. His fingers were shrinking, except for his thumb which was swelling a little bigger. He heard clicking as his bones rearranged but didn't feel any pain as his enlarged thumbs moved up the sides of his hands to be in line with his other fingers; although 'fingers' was hardly the word he'd use to describe them now. His palms were stretching out longer, while the base of his palms where they met the wrists were swelling. He felt his hands being pushed back as his new heels came in, and heard a few popping noises as his 'fingers' each lost a joint. His 'palms' had grown longer than his hands were and had developed arches - so they were definitely soles now. After a few seconds, it was over. He had feet for hands!
He excitedly turned his wrists this way and that, admiring his foothands from every angle. He sat back and lifted a leg up to compare one of his regular feet against a foothand; sure enough they were nearly identical, with the only difference being in the ankle/wrist area. He wriggled his toes, enjoying the feeling, and ecstatic that the Chronivac had worked!