User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-1011548-20110828105142/@comment-1680839-20110906011907

I think that the raths spit fireballs in a similar way to how we spit sinus :P You know, you gotta do this funny thing with your throat to bring the sinus up, then you forcefully eject it with a burst of air. That's probably why the raths have to bring their head up before spitting a fireball.