does anyone know wth this means In the original script Martys playing rock and roll at the dance caused a riot which had to be broken up by police This combined with Marty accidentally tipping Doc off to the secret ingredient that made the time machine work CocaCola caused history to change When Marty got back to the s he found that it was now the s conception of that decade with aircars and whatnot all invented by Doc Brown and running on CocaCola Marty also discovers that rock and roll was never invented and he dedicates himself to starting the delayed cultural revolution Meanwhile his dad digs out the newspaper from the day after the dance and sees his son in the picture of the riot   Its poorly worded and I have no clue what s conception of that decade with aircars and whatnot yadayada is supposed to mean