2 0 0Actions Report Solution *** Spoiler - click to reveal ***THIS IS A MISSABLE TROPHYWhen you first enter the expo you will see the "Hostile Guy" just next to him there is a booth called "Theremin Booth", when using this Marty will start to dance do this 7-8 times (Took me 7 but i've read online it can take 8) and he will do the moonwalk unlocking this trophy