 Karnes believes that the dinosaur is saturated by radiation, which is transmitted by the electric pulse, resulting in the burns seen on the fisherman and other victims.The radiation is also slowly killing the dinosaur.According to Dr. Samson, the dying creature will leave the ocean depths to head upstream, seeking out the shallow waters where it was born, but death by radiation may not come soon enough to prevent the creature from wreaking havoc on London along the way.