How did Jeff Goldblum get leg eaten off in Jurassic Park?

In "Jurassic Park," Jeff Goldblum's character, Dr. Ian Malcolm, does not have his leg eaten off. Instead, it is another character, Dr. Donald Gennaro, who runs into trouble with a T. rex. Malcolm is injured in the film but primarily suffers from a leg injury due to the events surrounding the dinosaur attacks, rather than losing a limb. Goldblum's character famously survives the chaos, providing critical insight into the park's dangers.