To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 Visual confirmation of multiple fractures of the axial fiber of a thread of cribellate silk of P. clavis. Uncoiling springs promote mechanical functionality of spider cribellate silk Dakota Piorkowski, Todd A. Blackledge, Chen-Pan Liao, Anna-Christin Joel, Margret Weissbach, Chung-Lin Wu, and I.-Min Tso Journal of Experimental Biology 2020. 223:None-None; doi: 10.1242/jeb.215269 Download Original Video