Ben, Gwen and Max are on a trip to Mexico to see some Bull Fighting, which Ben disapproves of, since he does not know Spanish. Meanwhile, in a lab, Senior Chaos is doing his final touches to a Metal Bull, which is controlled by a remote. He does this so that he can become the greatest Bull Fighter ever seen. Ben turns back to normal, but the Bull is now attacking the people. Ben turns into Four Arms and headbutts the Bull with such force that the Bull smashes apart, revealing that it is a mechanical bull. Finally, Senior Chaos gets arrested for his crimes.