A 36-year-old man disappeared Thursday night when a sinkhole opened up under his bedroom in Florida, swallowing him as his brother tried to rescue him, authorities said. Right after the ground started to give way in his home in Brandon, his brother frantically tried to keep him from sinking into the hole, an emergency official said. The first deputy on the scene pulled the victim’s brother from the edge of the growing chasm, said Jessica Damico, a spokeswoman for the Hillsborough County Fire Rescue.