On a recent Seattle morning, Adam Welch heard an crashing sound and saw broken glass everywhere. Turned out that his dining room had table spontaneously shattered. While spontaneous glass breakage is apparently a fairly rare phenomenon, there are several possible causes, according to Wikipedia. WCSH6 news took shards of Welch's table to Seattle Stained Glass for an expert opinion:
(Glass worker Justin) Ivy said if the glass has been damaged in the past, like a "deep scratch, a chip on the edge" that could cause problems.
"A hot pan, a bright sunny day, things like that, can cause thermal stress, and cause it to break. It can release that tension in the glass and cause it to just explode," Ivy said.