I won't even walk into a Walmart! Haven't in about 10+ years. Even though the video Spring posted is at least 5-6 months old it's still just as valid today. The video below is around 10-11-ish years old. It's still just as valid today as it was back then. And don't forget that Sam's Club is Walmarts whorehou . . . er, umm . . . warehouse, 'Costco like' store. I won't set foot in there either.
If you decide to watch it prepare yourself for about 90 minutes of teeth grinding. Might I suggest a Valium before clicking play.