Future becomes reality now that Nike has officially released Nike Mag, better known as those shoes that Marty McFly wore in Back to the Future. The retailer will be placing 1500 pairs of the shoe, in assorted sizes, on auction on eBay. 150 pairs will be up for sale each day for 10 days, and all proceeds will go to benefit The Michael J. Fox Foundation for Parkinson's Research. An accompanying site, Back4theFuture.com also allows visitors to view the shoe up close and personal, alongside Dr. Emmett Brown. There, they can also place eBay bids or donate to Fox's foundation.