Corrected entry: When the train is pushing the DeLorean and "Clara" on the train and trying to get to Doc, Marty is in the driver's seat, then the next shot he's in the passenger seat to where he passes the hover board to Doc, then when Marty passes through time to Eastwood Ravine he's back in the driver's seat.
envisaged0ne
2nd Jul 2015
Correction: There is enough time in between the shots where Marty could easily hop between the 2 seats.
envisaged0ne