Wow... is he the friendly kind or the one with friends and sharp teeth? Let me think... could be "running out of time", "chased by some beast [job/ expectations/ whatever...] in real life" or... feeling overwhelmed by a situation.

It might represent feeling like you are being threatened or intimidated by some sort of powerful force, or feeling like you are unable to control your environment the way you'd love to.

Solution: Learning to let go of stuff you can't control and take control on what is for you to control.

I'm not an expert though! Beware