door. after he says the glass spontaneously cracked and he's not alone. from glass tables -- >> out of nowhere our patio table exploded. >> reporter: to shower doors. some consumers are shocked by what they found. >> i heard an explosion and i came down to this. >> reporter: that's what duane brian of chicago says happened to him. >> right here was the leaf bowl. >> reporter: last summer he was awakened in the middle of the night to what he thought was someone breaking into his home. his glass sink had shattered into pieces. >> the power of it was so hard that it was also in the tub. >> reporter: the consumer product safety commission told us in the last two years there have been hundreds of reports of spontaneously shattering glass. the top three culprits, shower doors, tables and sinks. >> the reason tempered glass shatters is the glass might have an original flaw in the edge or scratch in the surface. the other reason is occasionally there's an impurity in the glass