In 1985, Doc Brown built a time machine out of a DeLorean, and when Marty McFly drove the car past 88 miles per hour, he was sent back in time to the year 1955. The only way that Marty could get back to the year 1985 was from the 1.21 gigawatts of electricity generated from the bolt of lightning that hit Hill Valley's clock tower.

Back To The Future has appeared on countless lists of the greatest movies ever made, and now you can show that you are a fan of the 1985 classic starring Michael J. Fox and Christopher Lloyd with this Retro 1.21 Gigawatts Back To The Future T-Shirt!