I recently purchased two frilled dragons at the Atlanta Reptile Show. Aside from being a little on the skinny side (working on changing that) they appear to be in great health. Then the other day I was watching them and, over the course of around 30 seconds, one of them shut his eyes and they started to bulge out. I could see its eyeball and it was turning blood red, as well as the skin around the eye. All of a sudden it stopped, and they returned to normal. I have no idea what may have caused this, and I have not witnessed it again. I now keep my camera nearby just in case there's a repeat. Any ideas?

