Sorry to tell you nay sayers, but it is a hidden yeti. Was done intentionally by WDI. As a matter of fact, if anyone else noticed they also were testing out different lighting schemes just before the ride opened on the mountain. One of the main reasons was so he could be seen better. Some of the lighting schemes made him disappear. Just for further thought, think of the opening when the boats come out and go down the big drop at splash mountain, it's a side profile of mickey's head, and a hidden mickey.