"...Then Lúthien catching up her winged robe sprang into the air, and her voice came dropping down like rain into pools, profound and dark. She cast her cloak before his eyes, and set upon him a dream, dark as the Outer Void where once he walked alone. Suddenly he fell, as a hill sliding in avalanche, and hurled like thunder from his throne lay prone upon the floors of hell. The iron crown rolled echoing from his head. All things were still.." "Of Beren and Lúthien", The Silmarillion - JRR Tolkien. Together Beren and Lúthien had reached the Throne of Morgoth in Angband and there the Dark Lord, Morgoth, saw through Lúthien's disguise and stripped her of it. Lúthien then declared herself and offered to sing for Morgoth and filled with an evil lust for her, he accepted. But when she began to sing Morgoth and his entire court fell into deep sleep. After this she sprang into the air and placed her cloak over Morgoth's eyes, shielding Beren and herself from him. This image captures that pivotal moment when Lúthien leaps into the air as she cast her enchantment over Morgoth and his court. Extremely difficult to capture in an image, but I think this angle works better in my mind's eye.