A brief drop test video posted online shows that Apple’s Bumper cases for the iPhone 4 offer little more protection than carrying the device bare. The video shows a man dropping the iPhone, encased in a Bumper, from roughly ear height multiple times until damage is visible. Mac Rumors notes that with the iPhone 4 inside the Bumper, it took three drops before the front glass cracked, the same number it took to break a bare iPhone 4. While Apple’s…