I have a model I'm working on for practice that looks okay when in object mode, but when I put it into edit mode, there's this strange shadow that makes the model look incorrect. Not sure how to word it exactly, but here's a picture. Is the mesh okay, or did something go wrong? https://drive.google.com/file/d/0B93qcyOtIKH4X3F2c0plMGt6a1E/view?usp=sharing