Interpretation is a wonderful tool, and its use should be planned for in every picture. Too many images are blunt in their meaning and their approach to a topic. Without subtlety, mystery or gaps set in the image, whether it be visually or conceptually, you might up with a picture that doesn't engage the mind.
What we have here could be an angry little boy running and yelling. Or a kid with a radioactive head. I will leave it up to the viewer to decide.