Question: I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: Labyrinth Movie plot: Fifteen-year-old Sarah Williams rehearses a play in the park with her dog Merlin but becomes distracted by a line she is unable to remember while being watched by a barn owl. Realizing she is late to babysit her baby brother Toby, she rushes home and is confronted by her stepmother Irene before she and her father Robert leave for dinner. Sarah has many toys that she has grown out of and realizes that Toby is in possession of her treasured teddy bear Lancelot. Frustrated by this and his constant crying, Sarah rashly wishes Toby be taken away by the Goblin King Jareth, a character in the play she is rehearsing. She is shocked when Toby disappears and the Goblin King confronts her then transports her to his kingdom. He refuses to return the baby, but gives Sarah thirteen hours to solve his Labyrinth and find him before Toby is turned into a goblin forever. Sarah meets a dwarfish man named Hoggle, who aids her in entering the Labyrinth. She has trouble finding turns and corners but then meets a talking worm who inadvertently sends her in the wrong direction. Sarah ends up in an oubliette where she reunites with Hoggle. After they confront Jareth and escape one of his traps, the two encounter a large beast named Ludo. Hoggle cowardly flees while Sarah befriends Ludo. After another riddle, she loses him in a forest. Hoggle encounters Jareth, who gives him a peach and instructs him to give it to Sarah, calling his loyalty into question as he was supposed to lead her out of the maze. Sarah is assaulted by a group of creatures called Firies with detachable body parts who try to remove her head, but Hoggle comes to her aid. She kisses him, and Jareth magically sends them to the swamp of the Bog of Eternal Stench as punishment, where they reunite with Ludo. Sarah, Hoggle, and Ludo meet a guard of the bridge out of the swamp named Sir Didymus, an anthropomorphic Fox Terrier and his Old English Sheepdog steed named Ambrosius. After Ludo howls and summons a trail of rocks to save Sarah from falling into the bog, Didymus... My question: What does Ludo summon to save Darah from falling into the bog?
Answer:
Rocks