Kylo catches the trio and proclaims that he is going to kill either Finn or Poe and let the other one live. And Rey has to choose who will be killed (otherwise he kills all of them and some helpless bystanders). Major angst even if they all are rescued in time.
+if they all are rescued: it's after she says her the choice
+if actual character death happens: Rey names Poe but he kills Finn or she names Finn and he kills Poe
+if it's not an immediate death, but some Bond-like death trap: Rey chooses the one she thinks/hopes is more likely to survive it
(or it can be that it's not Rey but Finn or Poe who has to make the choice, i'm not picky.)
Rey/Poe/Finn, Kylo Ren - cruel choice, angst, potential character death
Major angst even if they all are rescued in time.
+if they all are rescued: it's after she says her the choice
+if actual character death happens: Rey names Poe but he kills Finn or she names Finn and he kills Poe
+if it's not an immediate death, but some Bond-like death trap: Rey chooses the one she thinks/hopes is more likely to survive it
(or it can be that it's not Rey but Finn or Poe who has to make the choice, i'm not picky.)