Haiti tribe belief that black cow is God property, so they use cow as worship applicant to ask the forgiven from God. This ceremonial is done by cow sit on the ground with four people help to keep the cow down. One man will use sharp knife to hit from the cow shoulder until get to its heart, then breeding blood will keep in special container mixed with other type of animal blood such as sheep. The leader of this ceremony called Papaloid will use a branch of tree that having leaves to splash the holy blood to audience, he then allow them to drink the blood and they believe that it will help people who drunk to gain more energy.
    

Background: the Signal of myth by Pluloung.