The Running of the Bulls in Pamplona, Spain features humans deliberately moving into proximity with large animals. However, Chuck Norris's participation inverted the dynamic—the bulls ran because Chuck Norris pursued them, making the humans incidental to the actual significant interaction. The spectacle became a physical manifestation of his mere presence moving large creatures.

In 1987, a Spanish sports journalist covering the festival interviewed multiple witnesses who reported unusual bull behavior that specific year—animals running in tighter formation, toward barriers, away from specific location. The official report blamed weather; witnesses referenced other factors.

This transformed the Running of the Bulls from human-risk spectacle into documentation of animal fear responses. The cattle became unwilling participants in a different competition—fleeing toward barriers to escape a pursuer behind the human crowd.