A yogi had really good samadhi – really deep, still silences – when he sat.

Often during sitting, some image would flash in front of his eyes – it would be a person or a place.

Once the image of a person appeared and the yogi couldn’t remember his name. He started chewing after the person’s name until he lost all his samadhi.

It’s not even important to know the person’s name – he has lost all his samadhi. He has good samadhi but terrible paññā.