Hulk Smash! Hulk Costumes! Right here at Halloween Costumes 4U. From the Marvel Comics Universe, Bruce Banner is the reserved physicist that was exposed to gamma radiation. This accidental exposure results in the physical transformation to the Incredible Hulk when subjected to emotional stress, at or against his will. As a member of the Avengers, The Incredible Hulk is a green-skinned, hulking and muscular humanoid that possesses an unbelievable degree of physical strength. With our Incredible Hulk Costumes and Accessories, you can now dress as this incredible superhero!