Because Marty McFly, you are living in alternate 1985, need to manage your device a few years down the road and alternate 2015 where Biff Tannen is president of the US...oh wait...something close to that is happening now...never mind. But dig the bad jokes.

http://www.rollingstone.com/politics/news/back-to-the-future-writer-biff-is-donald-trump-20151021

Sorry if this offends anyone...on a roll cracking dumb jokes today.