the shoes designed by nike didn t actually lace themselves, it was low-tech movie magic. there was actually guys under the false floor that pulled the laces from beneath to make them tighten up. reporter: 26 years later, the dreams come true. are those the shoes? these are the nike mags. reporter: they sent michael j. fox an illustrated letter saying the project started as violence fiction, we re proud to turn that fiction into fact. we wanted you to be the first to receive a living pair. they sure sound like they are alive. they lace up on their own? yeah, see it? reporter: nike says the system senses the wearer s motion, a limited release of nike mags will be auctioned off with proceeds going to the michael j. fox foundation for