As Doc is driving out of town near the end, he stops to help Mary, who is having a difficult birth inside the family station wagon. Doc backs up and parks his car, the front-end is partially across road. While he assists with the birth, a large truck is fast-approaching, only Doc's car is now sitting all the way across the road when it gets hit.
When Doctor Stone meets with Bridget Fonda and Woody Harrelson at the bar in Beverly Hills, Bridget says "Is that a movie star?" and Woody says, "Nah, that's just Ted Danson" (a dig at Woody's then costar on 'Cheers').