
The Big One and her subordinate then made their way to the Visitor Center, where they stalked Lex and Tim. With the aide of her other subordinate, the Big One lured Robert Muldoon into an ambush, and when he least expected it, she jumped out and wrapped her jaws around his head, just after saying his very famous last words. When Arnold failed, Sattler and Muldoon tried to complete the task. The Big One sent one of her subordinates to find and kill John Arnold when he went to Maintenance Shed alone to reactivate the power grid.

Unknown to the survivors, the three Raptors broke out of confinement.

Later, when the staff decided to reboot the power to purge the computer system of Nedry's virus, it inadvertently shut down the fences in the Raptor's holding pen as well. In order to calm his investors, John Hammond invited Ian Malcolm, Dr. Ellie Sattler and Dr. Alan Grant to come down to the park for the weekend, hoping they would approve of the park's security measures. Jophery's death raised a number of safety issues, as well as a twenty-million dollar lawsuit against InGen. Despite the best efforts of Robert Muldoon and the security team, the Raptor was able to pull the gatekeeper into the cage and kill him. When the Big One was being transferred to the holding pen, she lashed out inside the cage, sending it backward and caused Jophery Brown, the gatekeeper, to fall over. As a result, an automated feeding system had to be installed on the holding pen. Muldoon claimed that in comparison to the other members of her brethren, the Big One had an extremely high problem-solving intelligence, remembering the location of certain weak spots in the fencing and where feeders would come to feed the animals. The Big One assumed her dominance after killing five of the other seven Raptors, commanding her two remaining subordinates to attack the security fencing. A few months after hatching, the Raptor pack was transported to Isla Nublar, the site of InGen's (upcoming) Jurassic Park theme resort. In the beginning, eight Velociraptors were bred on Isla Sorna.
