The Pruwahaha Monster

A five-year-old boy has gone with his father to swing on his favorite swing near the woods. But while he's been having fun swinging, a huuuuuge monster has woken up nearby from a very long nap. The monster is ravenous, and there's only one thing that will satisfy its hunger: little children! At first, the monster has no luck as it searches the woods for food. Then, oh, no! The monster spies the little boy on the swing! But when the monster creeps closer and tries to scare the boy with its fierce cry, "pruwwwahhahaha!" the boy isn't frightened at all. In fact, he only laughs at the monster and keeps swinging! Is the boy fearless? Or does he know something about this monster that we don't know?