If you turn the sound on, you'll hear Smith quoting Patrick O'Flynn, the UKIP MEP and former communications chief, warning that the party risks turning into "an absolutist monarchy and personality cult". Although that's not quite what he ended up saying.
Luckily, Smith made a smooth recovery and continued as if nothing had happened.
People on the internet were, of course, very amused.
Someone buy @BBCNormanS a drink. He’s made my day.
@MarcusDysch Hey @BBCNormanS, you were right the first time! @WomenDefyUKIP
...Norman Smith dropping the C-bomb there, live on air. While talking about Nigel Farage funnily enough. #Cultofthepersonality #UKIP
