Freefall in color by many folks.
Florence: I take it you want to know about the type of radiation that's hazardous.
Sam: Yes, please.
Sam: Keep it short and accurate. Make it entertaining so my attention doesn't wander. And no math.
Florence: Do I need to change my voice to illustrate different wavelengths?
Sam: Entirely optional. I don't want to make this difficult by imposing too many conditions.