The secret menu at West Coast burger joint In-N-Out isn't exactly a secret. Most In-N-Out aficionados are well aware that “Animal Style” (pickles, extra spread, grilled onions and mustard fried onto each meat patty) and well-done fries are the only way to go. But what you might not know is that In-N-Out will make you a burger with up to four patties; it's called a 4 x 4. The adventurous eaters over at The Chive took matters into their own hands and constructed their own DIY mega burger. Check out the giant 20 x 20!