this reminds me of a testimony i heard of a woman in south America that had died of a terminally illness and at the funeral they played some CD that she had requested from a nephew but the day arrived at the airport to see the found she had died the day before, anyway during the funeral, as she had requested this cd, i believe it was some kind of Catholic talk, everyone start to cry and she got, the whole church witness this and she was also cured from her illness, i believe she may still be alive today...
in fact i'm currently waiting to find out about a book that was translated from spanish to portuguese on these kind of matter, and where that story is also writen, i believe that specific book has 30 similar cases account for...
The away i understand such event to be possible is if one of more persons, are full of faith and try to love the person as if GOD was loving them, my faith is strong but such thing requires true love.