That is her death grip. The kill is a certainty now. Her weight alone is 
enough to pin the animal to the ground, no matter how desperately it struggles. 
Tikki would not be surprised if the creature died of fear alone. It’s happened
before. Some prey seem to realize that once she has them in her grip there can 
be no escape. She has only to squeeze with her powerful jaws and perhaps twist 
her head to the side for the creature to strangle or for the bones of its neck 
to split and break.