I came out to my car the other day and saw this.  Now it had been cracking for a while but I guess it finally went clear through.  I first noticed it shortly after I did the wall and the only thing that I can think of is that I have a very high pressure area that pools up on that side f the dash since everything over there is totally fizzucked.  Anyone else have this happen? Its right by the pass side a pillar. 
Here is the pic.  hope it works and doesnt suck since its from my camera phone.