san bernido is one of five in the world. it's 28 football fields big. that's massive. just to give you an idea of what 28 football fields can hold, 15 million different items give or take in each of the facilities. that's how much they can hold. look at items here. just to show you how they pack them in. tea next to a compressor next to tomato sauce. it's random. when you look at this, it's just very random how they have everything packed in here. they come along. they have pickers who come along ask and take goods and get them in a box. i want to take you over and introduce you to scott. he is one of the amazon guys. explain to me all the randomness on the shelves. how come it's random? >> it's random by design. we want to maximize our shelves so we can store as big a