We explore how humans synchronize, adapt, and lead within dynamic networks. In a series of controlled experiments—ranging from violin ensembles connected via custom audio links to groups of dancers moving in response to each other—we investigate how coordination emerges, how perturbations spread, and what causes individuals to become spontaneous leaders. By carefully designing who hears or sees whom, we reveal the hidden rules that govern collective timing, the resilience of social rhythms, and the subtle mechanisms of influence. This research bridges physics, psychology, and the arts to uncover the principles of real-time human interaction.