Throwing Light is an exploration into computational display systems that surpass the traditional rectangular screen. Using conventional, off-the-shelf video projectors and surveillance cameras, combined with robotic mounts and CG generated images, our system will throw a parallax-corrected projected image anywhere in an architectural space. The system will allow for a tight interaction between space, mobile viewers, and the output. While our initial applications are directed towards generating narratives that are linked to a specific site, there are many potential implications for human-computer interactions, such as augmented reality applications, mobile work-screens, and real-world agents.