Go to the beginning, when Jim gets to Luke's house. If you look in the background, you see an empty driveway where Jim pulled up. Later, when Woody is in his car, and leaving, it is in the driveway, and Jim's car is further up in the driveway. What I'm saying is that for Jim's car to have gotten past Woody's car, he would have had to gone THROUGH Woody's car. We know that Woody was already at the party, because he is seen earlier at the barbeque talking to two of the Mars 1 members, and his wife.