According to Iommi, he and the band would often set Ward's beard on fire and perform other harmful pranks on him. On one occasion, Ward received third-degree burns. In 1980, during the recording of "Heaven and Hell", Iommi doused Ward with a solution used by studio technicians to clean the tape heads. He then set light to the solution, which was much more flammable than Iommi had anticipated. Ward suffered third degree burns as a result and still has scars on his legs from the incident.