LORRAINE Kelly threatened to quit her ITV daytime show in an unexpected moment live on air.
The Scottish presenter's comments came as a chat with Good Morning Britain anchor Ben Shephard, 48, went wrong.
Lorraine, 64, was proudly set to tell a "really bad" Christmas cracker joke as she gave her daily preview of her chat show.
She asked Ben and co-host Susanna Reid, 52: "Why does Santa have three gardens?"
Yet before she could get the punchline out, Ben quipped: "It's because he's got a hoe hoe hoe."
Lorraine was left stunned as she said: "You've ruined - I'll get my coat," - threatening to quit her show because of the interference in her joke.
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Susanna, equally stunned, told Ben off and said: "It's not a quiz."
Referring to his other ITV show, she added: "You're not on Tipping Point."
Defending himself, Ben added: "You forgot to tell me it's not a quiz.
"I am proud of myself for getting it so quickly."
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Lorraine then went on to re-tell the joke with no interruptions.
Meanwhile, Tipping Point's return date was recently revealed after fans fumed at the show's absence.