Have you ever wondered how Princess Rapunzel could bare so much weight as she pulled up her prince? How could her neck not break? How could she not lose her skull? In reality, what she did was impossible. The physics of that fairytale made her story impossible.
But the recent developments have made her story slight more realistic. In more modern stories, Rapunzel no longer just throws down her hair. In newer version, she wraps her hair around something. Even something small like a bed post would save, both Rapunzel and her prince since he is no longer hanging onto the wall by her scalp.