What is the fine-grained topic of the following text: Chad is the only son of the late hollywood actor Steve McQueen who raced a 1968 Bullitt Mustang in the popular chase scene in the movie titled “Bullitt.” Meanwhile, artist Camilo Pardo made a special one-of-a-kind painting to commemorate the launch of the McQueen Bullitt Mustang. Only return the topic.
Chad McQueen and the commemoration of Steve McQueen's 1968 Bullitt Mustang.