"I can't eat lunch with them anymore. They're talking about the physics of light-sabers."
"What?"
"Yeah, like if you dropped a light-saber in the ground, would it cut straight through the Earth."
"Well that's stupid. As the light-saber gets closer to the Earth's core, it would generate steam, which would prevent it from moving."
"Are you kidding me?"
"Haven't you heard of the China syndrome?"
"You know, I'm just going to eat outside."