How far do you let players go with spending destiny points to alter the outcome of your game?
I see it as a flash back to one of Starwars pulp influences like 'Flash Gordon' and 'Radar Men from the Moon'. The heroes are in peril and a last change in fortune allows them to escape.
Here is a cliff hanger theater example.
http://youtu.be/eCHI-TaI4zM?t=12m19s
Relating it to Starwars, I see scenes like from New Hope were the heroes are trapped in the detention area and Leia shots a hold in the wall, or from Jedi when Luke looks like he will be eaten by the Rancor until a door with jagged teeth shows up and he throws a rock at the control panel.