My own favourite story of BSOs (Bike Shaped Objects aka Walmart bikes), which I've told here before, bear with me ;-), is of our neighbour who came by with a childs bike that "didn't work", and asked if I could possibly take a look. Both wheels were flat, of course, but the humdinger was that the gear cables and housing hadn't been cut to fit, were of course way too long so had been wrapped around the frame, making it impossible to use the gears...