Simon felt like his head was going to explode! It could have been from a number of things, whether it be from the overload of information that had been gained from Tyaelaem and Rhea about the lanterns; the disturbing feeling that had been delivered by the rabbit taking him up tree; and last but not least that Simon was truly afraid of heights. 

A lot of things that Tyaelaem said made a little bit of sense, he had felt an eerie small connection to 'The Sparrow King' as he referred to him. Simon remembers seeing something with horns when he ate the flame back when they got attacked by the monkeybats. Simon feared that Tyaelaem had been telling the truth about this but he didn't really see how the land could be watched over by a giant dragon. He also didn't feel like he would be much safer in this already unfriendly place with a dragon on the loose, however he didn't really feel safe as long as Rhea was around. 

Simon was bear hugging the trunk as hard as physically possible to avoid falling out of the tree, since he was having a tough enough time surviving here to begin with. Quickly before his arms could get tired Simon took his left hand and swiftly placed the fox mask from on top his head to over his eyes since he felt like it would give him a little bit more courage while he tried to avoid tumbling out the tree. 

Simon was thinking of how he would be able to stop Anise from breaking anymore of these eggs without ... Well without having to kill her.