Jacen glanced from Sarah to the weapon in his hand, trying to think just how he could explain it. Somehow he didn't think 'from my friend who was turning back to the dark as her time as a joiner came back to her, after she asked me to kill her' would exactly go down well. And that was the easier story, he imagined explaining his other lightsaber, in the traditional Sith red would be even more awkward to explain.
"It's a really long story," he started. "But look, see it's not a prop. It's a real lightsaber and I'm really Jacen Solo and believe it or not, we're friends. Someone has done something to you and you have forgotten who you really are."
Now. Now he suspected it was time for her to start really screaming and calling him a crazy person. Or maybe listen to him, who knew?