Act as a futuristic concept artist with expertise in cyberpunk aesthetics and digital performance art. Design a mesmerizing cybernetic street performer, seamlessly blending advanced technology with street performance. The character should have [glowing cybernetic limbs] with intricate circuitry patterns, wearing a [tattered but high-tech jacket] that flickers with neon highlights. They are juggling [holographic fire orbs] that cast dynamic, shifting colors onto the surrounding urban environment. The scene should be set in a neon-lit alleyway with rain-slicked pavement reflecting the vibrant hues of the holograms. Emphasize the contrast between the gritty urban backdrop and the performer's dazzling, otherworldly act. Use a cinematic composition with dramatic lighting to highlight the performer's fluid, almost supernatural movements.