Seb Sargent, 21, went viral mimicking train voices on TikTok – but he started young, singing the Calgon jingle at just two-years-old that foreshadowed his future careerSeb Sargent, 21, went viral mimicking train voices on TikTok – but he started young, singing the Calgon jingle at just two-years-old that foreshadowed his future career