Here is a set of three 1999 Delaware "Spitting Horse" die crack error coins. It is a rather well known die crack error for the Delaware state quarter. The first photo is of what I would consider a mid die state strike. The die crack goes from exactly at the mouth of the horse down through the C in Ceasar and continues to the rim in an almost straight line angle. The second photo is of a second coin I found that appears to be an earliert state strike since it seems to be a slightly less pronounced crack, but still plainly visible (in hand), but hard to photograph. The third photo is of a completely different die with a similar early state die crack. I think one can see the die crack is actually above the mouth line about half way between the mouth and nostril. The die crack actually ends before it has reached the C in Ceasar (indiated by the blue arrow). Oddly enough, it is on almost the exact same angle as the other die crack on the other two coins.
Hopefully the photos are clear enough for everyone to see the die cracks.