Moonshine, a 100 word story

The full moon is sitting low in the sky when I feel the change come over me. It always happens this way, and it’s always painful as Hell.
The muscles start to shift, and the bones mutate. I can feel my teeth change with my tongue even as it too changes.
I can feel strange urges stirring in my brain. I know from experience that I’ll not remember this while in my other form, but during the transition I can see both sides of the coin.
The most terrible part… I have to spend the next month as a human.