I call this maneuver the "Hail Mandy." I started doing this when I was multiboxing my Paladin and Druid. When the Paladin, who was tanking, died and the Druid was going down, I would cast rebirth on the Pally. Then after the Druid was killed and the mobs reset, I would accept the rez. This allowed me to raise both characters and start back up on my merry, dualboxing way- just like using a Soulstone.