After Snake's friends leave the partridge house, he's sitting on the couch with Shirley and Laurie and Keith are in the background with Keith holding a bag of groceries. Clearly there's eggs in the middle of the bag and a carton of milk on the right. It cuts to a close up of Laurie and Keith, but the milk carton is now on the left.
Although played by different actors, the character of Snake is supposedly the same biker that dated Laurie in season 2. However, then his name was Harry Murphy and here it's Haman Timothy Goodwell.