Bullet-proof glass, while an amazing, life-saving invention, is no match for a rocket-propelled grenade. As if we needed proof, we see video evidence of that fact in this video from Russian YouTube channel Crash Zone. They set 16 inches of bulletproof glass up against the anti-tank rocket-propelled grenade. Later they do a second test with an added piece of glass. But who cares about the test — it's really all about watching things get blown up, is it not? Via Popular Mechanics