In Seventh Iteration: Almost Paradigm, Hammond is terrified to hear the tyrannosaur's roar while he is out for a walk, until he realizes that Tim and Lex are just playing with the loudspeaker. His internal monologue, thick with situational irony, is practically befitting of a cartoon villain:

Those damned kids!

He should never have brought those kids. They had been nothing but trouble from the beginning. Nobody wanted them around. Hammond had only brought them because he thought it would stop Gennaro from destroying the resort, but Gennaro was going to do it anyway. And the kids had obviously gotten into the control room and started fooling around—now, who had allowed that?

Hammond has long since demonstrated that he is a negligent grandfather, but he has previously seemed more misguided than callous. This passage suggests otherwise. It also reveals that Hammond is an astounding hypocrite. He regrets bringing Tim and Lex to the island because "they [have] been nothing but trouble from the beginning" and because they have "gotten into the control room and started fooling around," as kids are wont to do. But Hammond, of all people, has no business accusing the children of causing "trouble" or "fooling around." He is the one who has caused all the "trouble" on the island by "fooling around" with biology. Should he survive (which he does not), there would be a strong case against him for criminal negligence in several people's deaths. Meanwhile, his grandchildren (especially Tim) have helped avert an even bigger crisis by restoring power to the island. Tim has earned the right to push some buttons in the control room. If anyone should be barred access, it is Hammond himself.

Adding to the irony is Hammond's reflection, during this same scene, on the events that have transpired on the island. He concludes that everything is Wu's fault -- except, of course, for the parts that he blames on his grandchildren, Gennaro, or anyone else but himself. Not only does he fail to take any responsibility for the disaster, but he also begins thinking about how he will start the project all over again, on a new island. Hammond's reckless determination and lack of self-awareness make him seem more childish even than Lex. She at least tries to listen to people who know more than her. Hammond may be the oldest character in the book, but he is also the most childish.