You Are My Density Back To The Future T-Shirt breadcrumb-fantastic-four in Metropolis after competing in

in Metropolis after competing in the Olympic decathlon

The insults were traded between Hamilton "Ham" Porter and his nemesis

Cassius Clay is remembered for floating like a butterfly

and the shirt includes the phrase "May The 4th Be With You

You Are My Density Back To The Future T-Shirt breadcrumb-fantastic-four in Metropolis after competing inThis Back To The Future t shirt features a black and white image of Doc Brown's DeLorean speeding away, leaving fire tracks on a starry night. The shirt reads You Are My Density. In Back To The Future, Marty McFly back in time to the year 1955 in Doc Brown's time traveling DeLorean. Marty met his parents, George McFly and Lorraine Baines when they were only teenagers. Marty had to make sure George and Lorraine fell in love to secure his own existence.