Bulletproof Glass Question: How does bulletproof glass stop a bullet? Answer: "People who live in glass houses shouldn't throw rocks" Don't believe it. With bulletproof glass you can throw rocks, have a professional wrestler head-butt it, or go for your gun and plug a pane or two. The glass may crack but it probably won't break. They most often make this glass by bonding alternate layers of glass and certain plastics in a kind of sandwich. This structure has the physical property of absorbing a bullet's momentum, dispersing its destructive force before it can break all the way through. Heating and then chilling it can also make a super-strong bulletproof glass. If that doesn't work, maybe Arnold Schwarzenegger can catch the bullet with his teeth.