To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1. Crack propagation occurs on fast timescales. Color change due to internal reflection from newly formed surface. Controlling fracture cascades through twisting and quenching Ronald H. Heisser, Vishal P. Patil, Norbert Stoop, Emmanuel Villermaux, and Jörn Dunkel PNAS. 2018. 115:8665-8670 DOI: 10.1073/pnas.1802831115 Download Original Video Browse All Videos »