If you have ever wondered why some products contain warning labels that anyone with a lick of common sense would already know, get a load of this—an iPhone user in China was shopping for a new battery when he decided to put a potential replacement in his mouth, and bite down on it. The battery then exploded in his face, with the incident captured

Source: Hot Hardware – Man Bites iPhone Battery Sparking Lithium-Flavored Explosion In His Mouth