Cassandra Truth: Literally, in Cassie's case. Cassie tries to warn the others that there's something suspicious about the cave they lost their ball in, but they go inside it regardless. Not too long after, it's revealed that the "cave" was really a giant rhino, and they accidentally walked right into its belly.
Getting Eaten Is Harmless: Everyone is perfectly fine inside the Dragonoceros' stomach and come out no worse for wear.
Idiot Ball: Cassie may be the smartest of the main characters besides Quetzal, but Max, Emmy, Ord, Zak and Wheezie aren't normally this stupid to walk into the "cave".
