Movie S3.

Deformation of an uncreased (α=0) and creased [α=0.5 (exhibits monostability) and α=0.6 (exhibits bistability)] hemispheres made from poly(vinyl siloxane). High-speed video of snap @ 500, 4,000 fps included. For α=0.6, the deformation goes through Pogorelov regime (timestamp: 00:37), the nonaxisymmetric snap (timestamp: 00:40), and final snap (timestamp: 00:43).