The Innate Ability was known as the Wounded Maniac Innate Ability and upon the experiment succeeding, he broke free of his chains with the great power that was awakened within him.
The transformation into the monster took a short while and it wasn't a complete success that could be called a Beast Innate Ability, but it was the closest they had gotten to succeeding and he would become a frightening monster.
It was a joyous day for the mad researcher and the family as he began calling them over to watch the transformation of his own child into a grotesque monster.
The entire time he seemed to be screaming in pain and agony and it was as if an entirely different entity within him was taking over his body and changing it into a beast.
However, after the transformation was completed, they couldn't believe how wild, unrestrainable and powerful he had become and he ripped up his father, the mad researcher, along with many others into shreds.