2015 MacBook Pro 15" - Something loose inside?
I own a 2015 MacBook Pro 15" 2.5 GHz/16GB/512GB/AMD GPU. When I was putting my MBP into my backpack tonight, I felt what I thought was something inside the machine shift toward the side going in first. I pulled the laptop out and shook it laterally, and it seemed like a large component was moving slightly to the left and right edges of the case. I tried shaking the machine with both the lid open and closed and noticed it only when the lid was closed. Whatever it is, it's not very loose, so it requires a littlebit of effort to notice it. I don't see anything out of the ordinary from the outside, and the computer seems to be working properly. Any ideas on what might be happening? Is this normal?
MacBook Pro (Retina, 15-inch, Mid 2015), OS X Yosemite (10.10.3), null