The material does not seem to be solid, nor liquid, but instead a ball of fire that is burning of its own accord.
I'm sorry, but you managed to hit on one of my biggest weaknesses as a GM. I'm bad about not giving out HP or XP. My tabletop group always asks if I'm feeling alright when I do. I tend to get caught up in the story. I DO usually give them though at the END of scene. It takes a REALLY outstanding action to get HP IN a scene.
That being said, I don't think there are quite that many instances of individual HP. However, when this scene is over, I'll be making my HP awards.