4. Griff Tannen Felix Allen of Chandler is a major fan of the Back to the Future trilogy. So much so that he owns an actual DeLorean decked out like Doc Brown's fictional time machine, which was on display in front of the Phoenix Convention Center on Saturday, and came dressed as Marty McFly during Comicon weekend.
On Sunday, however, the 31-year-old showed off his Griff Tannen costume, replicating the entire ensemble of the psychotic, cybernetically-enhanced bully from Back to the Future II. While we could nitpick the fact he used Marty's neon pink hoverboard instead of Griff's badass Pit Bull model, it was still pretty damn cool.