Bulls aren't killed in Portuguese bullfights. These Forcados are showing the last 2 phases of their part in the fight. I'll post photos of the first phases showing how they put group grab on the bull horns. Sometime soon. Maybe :-)
From Wikipedia: Forcados - The forcados are a group of eight men who challenge the bull directly, without any protection or weapon of defense. The front man provokes the bull into a charge to perform a pega de cara or pega de caras (face catch). The front man secures the animal's head and is quickly aided by his fellows who surround and secure the animal until he is subdued.