There are 3 sightings of a person who has just recently died, skeptical?

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I was at first skeptical but when I personally talked to these three persons, they all confirmed that they saw the dead person (may he rest in peace). There was nothing unusual about his appearance. He did the usual things he did to them while he was still alive; to the first woman, he called her by her nickname, to the second, he greeted him, and to the third - he asked if he was done. These three people were really astonished when later on they learned , he had died. The three persons are legit and never tell a lie and they barely knew each other. What do you think of this? How could you explain that?