Maria, David, Big Bird, and the kids are waiting for the bus to take them to Grandma Grace's farm for the day. They invite Oscar along for the trip, but he has no interest in watching little kids have fun all day. Just as everyone boards the bus, he realizes the Grouchy potential a trip to the farm has (such as seeing pig stys and broken farm equipment). He misses the bus, so he makes the trip on foot (while in his can). (thetvdb.com)