there is not any evedentations of him seeing anything wile dieing, maby he would said that he saw deamons or angels. the story of Lazarus does not go into detale with what Lazarus has seen. just that he was dead and now alive.
besides there are alot of evedence were people were in comas and awaken in there coffin, there were tons of grave stone desings that has bells, and bobbles that let anyone that was burried get help and excape. there has been coffins that were excumed and opened that had scratches on the lid, and things shifted ripped appart and the body shifted.
i am not undermining the valididy of the story of Lazarus but just saying that there were not that much of the story beyond he died and came back.