Alison Hammond and Dermot O'Leary were unable to control their laughter as the Speakmans issued advice on phobias.
Nik Speakman and Eva Speakman, known collectively as The Speakmans, are therapists and life coaches that regularly appear on This Morning.
Today, they were helping viewers banish their phobias and giving tips and tricks on how to overcome anxiety.
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One viewer, Lulu, rang up to discuss with the Speakmans her phobia of terracotta pots.
She explained how when she was a child she had been involved in a road accident and landed head first on a terracotta pot.
Ever since Lulu has been frightened of the ceramic, explaining that she now becomes ill when she sees one.
Nik revealed that Lulu's phobia comes from her brain connecting terracotta with her flight and fight mode.
Eva then asked Lulu to consider that the terracotta pot was just as much of a victim as she was.
At that moment, laughter burst through the segment as Alison and Dermot were seen trying to stifle their snorts.
Discussing the segment on social media, some felt sorry for Lulu, although others said they would have reacted in the same way Dermot and Alison did.
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Sharlene tweeted: "Poor caller Lulu with Alison and Dermot laughing at her stressing phobia."
Beverly wrote: "I think Dermott’s thinking what I’m thinking!"
Doyle said: "Dermot laughing is the best thing!"
Leanne tweeted: "Dermot is cracking me up."
And Shannon added: "I knew many people with weird phobias but I wouldn't sit and laugh at them."
