Bart and Lisa stand together in a green-walled room with a red-framed window and purple floor, first gripping hands and struggling, then glowing…

What happens

Bart, in an orange shirt and blue shorts, and Lisa, with spiky hair, a pearl necklace and a red dress, stand together in a green-walled room with a red-framed window and purple floor, first gripping hands and struggling, then glowing outlined in electric blue and orange as a surge of lightning arcs around them. They separate and turn to face each other, then stand side by side against the green wall while Bart gestures and Lisa looks skeptical. Bart then holds a pink box of candy as a blue mouse with a long snout, orange shirt and a knife-like tool confronts a skeleton-costumed black cat at a doorway; the cat's head is cut off by the blade and sprays blood, with the severed black head flying upward and red droplets spattering the walls.

Written by an AI model from frames of this moment, so small details can be off.