What is how did jay hickman die?

As an AI language model, I cannot ascertain the exact person you are referring to but if you mean Jay Hickman the American comedian, he passed away on March 16, 1994, due to heart failure at the age of 47. Hickman had a history of heart problems and suffered a heart attack two weeks prior to his death while performing at a comedy club in Birmingham, Alabama. He was survived by his wife and three children.