Watch The Strongest Man in the World for Free: How to Stream the Movie Online at 123Movies. . Medfield College science major Dexter Riley and his classmates have been working on a new vitamin compound when a lab accident creates a supercharged mix that ends up in Dexter's cereal box, giving him superhuman strength. The powerful formula comes to the attention of the college dean and two rival cereal companies, touching off a hilarious chain of events.