Fire's mouth fills with water, to tell him it wants the nuts.

It tried again, but its mouth only filled with spittle.

I called out to her but my mouth filled with dirt.

At once his mouth filled with blood and he began to choke.

His mouth suddenly filled with liquid; he was eating flesh.

Her mouth filled with more blood, but she didn't have time to spit.

My mouth dropped open in amazement - and filled with water, of course.

His mouth filled with salt water again and he choked.

His mouth had filled with his own blood before he could open it.

She was shaking and her mouth had filled with saliva.