I was invited to the Hack the Body expert meeting on synchrony, organized by Baltan Laboratories and Holst Centre. It was part of the 2015 TodaysArt festival, specifically the Bright Collisions Symposium. I prepared a short presentation, but ended up using the material mostly for discussions with the group. The meeting brought together scientists, artists, engineers and product developers to discuss topics related to biometric synchronization: “Can two or more people synchronize their biometric signals (heart beat, respiration, gsr-sweat) with each other? Can synchrony of these signals be induced? What measure of synchrony can be established? How can synchrony be represented, modeled within the environment, and used as a catalyst for feedback? What hardware can we use to measure biometric sensing and feedback such as ECG, EEG, GSR?”