When John Galt is captured by the looters, Ferris uses the device on Galt, but it breaks down before extracting the information Ferris wants from Galt.
wˌɛn dʒˈɑːn ɡˈɔlt ɪz kˈæptʃɚd baɪ ðə lˈuːɾɚz, fˈɛɹɪs jˈuːsᵻz ðə dɪvˈaɪs ˌɔn ɡˈɔlt, bˌʌt ɪt bɹˈeɪks dˌaʊn bᵻfˌoːɹ ɛkstɹˈæktɪŋ ðɪ ˌɪnfɚmˈeɪʃən fˈɛɹɪs wˈɔnts fɹʌm ɡˈɔlt.