That's the Bath Room Nit-Wit, and his tale of woe is meant to warn children about the dangers of showering improperly. But that child isn't just being scalded by hot water -- his mouth is a portal to a dark realm, and he is terrified by what's contained within his own orifice. This is a drawing someone would find on the wall of the child's bedroom in the spooky old house they inherited, right before that child appears next to them with a knife.
Oh no, Downstairs Nit-Wit left his toy train on the stairs, then tripped on it! He looks mildly put off by the fact that his skull is about to be forced into the space that his noodle neck once occupied!