hˈæm ɪz nˈoʊn fɔːɹ ɹˈaɪɾɪŋ ðɪ ɪnˈɪʃəl dɹˈæfts ʌvðə skɹˈiːnpleɪ fɚðə nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi nˈaɪn bˈætmæn mˈuːvi bᵻfˌoːɹ ðoʊz dˈuːɾiz wɜː hˈændᵻd ˌoʊvɚ tə wˈɔːɹən skˈɑːɹɹən.
Hamm is known for writing the initial drafts of the screenplay for the 1989 Batman movie before those duties were handed over to Warren Skaaren.