Explore the groundbreaking possibilities of JavaScript in the physical world through this captivating JSConf US 2015 talk by Jan Jongboom. Discover how to bridge the gap between digital and physical realms using JavaScript, from generating procedural music with audience sensor data to hardware hacking Firefox OS phones. Learn about innovative applications like bluetooth beacon-based social interactions and geofencing newborns with phone mainboards. Packed with live demonstrations, this 33-minute presentation challenges conventional notions of JavaScript's capabilities and inspires new ways to alter the world around us using code. Delve into topics such as the All-girl Raves project, sensor data manipulation, beacon scanning, and creating a JavaScript baby monitor. Witness the future of JavaScript as it extends beyond computers and phones, revolutionizing our interaction with the physical environment.