pain but not during transformation
It is true that there is pain when transformation occurs or when you get close, the mind and body will become weak. The mind was not made for the type of stress it will be under while a change begins to take place, it’s not natural for humans. Black outs will occur, you may not transform completely, but your mind will have felt the pain of trying to transform, headaches are likely, sweat, and often losing consciousness for a brief period of time. Officially there is not a name for the black outs, the times when you may have felt transformation, but didn’t transform. You will wake human, you will not have transformed, and you will remember the pain.