Originally Posted by AnneFan
He sees his face in the reflection of a puddle:
That Joker went insane because seeing himself was the final straw in his already crumbling sanity.
Jack's Joker went mad after he saw his once 'perfect' face, be reduced to **** lol
So he embraced his new face, seeing it as 'art', and becoming a new form of perfection, in his warped mind.