Hulk can lift, throw and smash things, which are much heavier than he. Remember the scene as Hulk thrown a tank in Ang Lee´s movie and in one of the comics? That could not work because the weight of the tank was much higher than the weight of the Hulk. By the centripetal force Hulk could not remain on his feet. With more weight, he could. However, it is not just about tanks. There are so many other objects wich are heavier. Hulk would not even be able to collide with a fast-moving Hummer. With a higher weight, he could.
So, what do you think about this idea?