A heart attack killed Garry Shandling on Thursday morning, TMZ reported on Friday. The 66-year-old comedic actor allegedly felt poorly the night before his death, calling a doctor who advised him to visit the emergency room if his shortness of breath continued. According to TMZ’s sources, Shandling called 911 in the morning and fell unconscious during the conversation. Paramedics had to break down his door and found him unresponsive with a light pulse. He was pronounced dead at the hospital.