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?

You're not familiar with the concept of 'suspension of disbelief', are you?

@jonsmith: Yes, I am. But I don´t like it :-)

Hulk is fueled by nuclear power(forces of absolute atomic destruction), not the weaker gravitational forces.

@dum529001: But that does not mean that he could not even raise his body weight. Why not?

@theacidskull: Even in fiction, it is possible to accommodate a certain degree of logic.

@theacidskull: Yes, that´s right :-)

But without any fictional logic, no Hulk.

I remember in some comics Hulk did increase his weight, like the time when Deadpool tried to commit suicide by Hulk. I guess S.B.H. really is a thing... But anyway like people said you can't apply real world logic in fiction. I mean if you want to split hairs Hulks whole existence is scientifically impossible.

Do you mean like how The Vision can change his weight?

@v_scarlotte_rose: I don´t think so. I mean: more weight without increasing the mass, like more gravity.

@zardu: I think that's how The Vision does it. He doesn't get any bigger or smaller.

@v_scarlotte_rose: Wiki says:

"The Vision controls his density by interfacing with an unknown dimension to/from which he can shunt or accrue mass, thus becoming either intangible or extraordinarily massive." He doesn´t get any bigger or smaller, but he shunt or accrue mass.

I didn´t know "The Vision" before you mentioned him (shame on me :-). I only know what I've found about him on the web.

@zardu: Oh, O.K. My point was just that he can make himself heavier without changing size, which I thought was what you were looking for.

@v_scarlotte_rose: Do you like the idea?

@zardu: Maybe. I don't know a lot about Hulks, but it's an interesting power.