The philosopher Zeno of Elea centred one of his paradoxes on an imaginary footrace between "swift-footed" Achilles and a tortoise, by which he attempted to show that Achilles could not catch up to a tortoise with a head start, and therefore that motion and change were impossible.
ðə fɪlˈɑːsəfɚ zˈiːnoʊ ʌv ᵻlˈiə sˈɛntəd wˈʌn ʌv hɪz pˈæɹədˌɑːksᵻz ˌɔn ɐn ɪmˈædʒɪnˌɛɹi fˈʊtɹeɪs bᵻtwˈiːn "swˈɪftfˈʊɾᵻd" ɐkˈɪliːz ænd ɐ tˈɔːɹɾəs, baɪ wˌɪtʃ hiː ɐtˈɛmptᵻd tə ʃˈoʊ ðæt ɐkˈɪliːz kʊd nˌɑːt kˈætʃ ˌʌp tʊ ɐ tˈɔːɹɾəs wɪð ɐ hˈɛd stˈɑːɹt, ænd ðˈɛɹfoːɹ ðæt mˈoʊʃən ænd tʃˈeɪndʒ wɜːɹ ɪmpˈɑːsᵻbəl.