system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/Fantastic Four] How did Reed, Sue, and Johnny get cool powers, but Ben got stuck as a rock creature?
gpt
According to element theory, Reed is water, Sue is air, Johnny is fire, and Ben is earth; Ben's transformation is more drastic than the others in strictly physical terms, since his appearance differs from human norms, but thematically it's an expression of the same basic idea. Other versions of Ben Grimm have it as a transitional form (Ultimate Thing, for example).

Also, some people think being able to trade punches with the Hulk is a pretty cool power.