Overreaching
This looks decent upon first glance, but the odd juxtaposition between the perfectly on-model body of the main character and the hideously bad animation of his eyes and the water quickly gives away the fact that this is simply rotoscoped from a 3D animation tool.
I have to suspect that the models and animation routines involved were simply imported from an external source and not created by the author, and as such I doubt that an actual hand-drawn animation from him would have been very impressive at all. What is the character model from, Quake 3? Still it's always fun to see someone's ambition overreach their capabilities, especially when that artist decides to attack other animations for being intentionally simplistic.