Good news and bad news for all you budding Marty McFlys out there. It turns out the Wednesday night rumors were true: Nike has released a limited number of 'Back to the Future Part II' MAG sneakers! If you've got thousands of dollars lying around, you can head over to Nike's special eBay site and bid on a pair, with proceeds going to the Michael J. Fox Foundation to support Parkinson's disease research. The bad news? The sneakers don't self-lace; check back for those in 2015 (wink, wink, nudge, nudge). Watch the Frank Marshall-directed commercial for the kicks -- featuring Bill Hader, NBA superstar Kevin Durant and Doc Brown himself, Christopher Lloyd --ahead.