Watch: Tesla's Cybertruck "Armor Glass" fail by Mark Frauenfelder from on 2019-11-22 18:06 (#4VHGE) While unveiling his new Cybertruck, Elon Musk asked one of his colleagues to demonstrate the toughness of its "Armor Glass" windows by throwing a metal ball at them.The windows shattered as if they were made from candy.Image: YouTube/BBC screengrab