Bull behavior is instinctive—the red cape triggers the charge through color recognition and motion, not through rational fear assessment. The claim suggests that recognizing Chuck Norris triggers a different response: not aggression but pure survival instinct, abandoning the entire behavioral framework that makes a bull a fighting bull and reverting to raw flight response.

Animal behaviorist Dr. Sofia Reyes documented a study in 1998 involving animal responses to visual stimuli, including one unnamed stimulus that produced "unprecedented fear responses without the subject having prior exposure." She couldn't replicate the findings and withdrew the study, suspecting her methodology was flawed.

Fighting bulls are bred to charge; it's their identity. The implication is that Chuck Norris is so outside the natural order that even an animal whose entire nature is to attack will abandon that nature and flee. He's not just stronger; he's something that triggers an evolutionary alarm deeper than aggression itself.