Runaway Cart

Emily tells a story of a vacation she remembers while in high school.  The trip was to Canada.  During a grocery store visit they loaded a cart with groceries, purchased them and proceeded to unload them in the car.  She reports that the parking lot was on a hill.  They were parked at the top of the hill and the grocery store was at the bottom.  They let go of the cart long enough to open the trunk and looked up to see the grocery cart speeding (full of groceries) like a barn sour horse back toward the store.  Her favorite memory of the trip is watching Dad chase the grocery cart to catch it before it crashed into the store!