At the full moon and after very successful hunting or fishing expeditions, the Karankawa traditionally held a ceremonial. After gathering around a central fire, they boiled a strong and bitter brew from the leaves of the yaupon tree and stirred it until the top was covered with a yellowish froth. This brew was shared and all the Karankawa drank freely. Although this brew was said to be intoxicating, Europeans did not notice any visible effects on the natives. One Native stood within the circle of men, wrapped up to his head in skins, and he bent over as he walked circled the fire. They chanted in chromatic ascending and descending tones, and all the Natives joined in the chorus. This ceremony would continue throughout the night.