When Ben and Susie are introducing their 'Electro City' play, as the camera cuts from each character and to both characters, Bradley Cooper's arms visibly change their position each time, which doesn't match up with the previous or following cut.
This episode is set in 1981. You can see a Dodge minivan that was not introduced until 1984. If you look closely you can see a large rust hole above the right rear wheel.
(at around 9 mins) The setting is June 24, 1981 but when Amy is saying goodbye to her Dad they are standing next to a rusty Chrysler (Dodge Caravan or Plymouth Voyager) minivan which were not introduced until 1984.