At one point in Fantastic Beasts and Where to Find Them, Newt Scamander winds up having to make a deal with a goblin named Gnarlak, played by Ron Perlman. Below is an image of Gnarlak from that scene.
As you can see (most obviously on the hand holding the cigar, but also on the hand holding his drink), Gnarlak's fingers are all bent out of shape, curling back on themselves and nearly touching the back of his hand. It's... gross, and very noticeable throughout the scenes that Gnarlack is in, and yet no one in Fantastic Beasts and Where to Find Them makes any reference to his unusual fingers.
So why are Gnarlak's fingers like this?