Known for fighting the paranormal in his signature role alongside Bill Murray and Dan Aykroyd, Ramis will long be remembered for his clever brand of on-screen humor. The actor, writer and director, whose film work also included Animal House, Stripes and Groundhog Day, died yesterday at age 69. He suffered from vasculitis, a disease where the body’s immune system turns against the veins and arteries. Celebrated as a genuine “nice guy,” colleagues have paid tribute by pointing to both his comedic genius and his ability to inspire. Many will find themselves whistling a familiar 1980s smash hit today and mouthing the words “Who You Gonna Call?” by way of a farewell.