A man woke up to find firefighters had broken into his Hartman Street home in Accrington because his daughter thought he had suffered a stroke.
The man's worried daughter contacted emergency services when he drifted to sleep during a telephone conversation with her.
Fire chiefs said she thought he had had a stroke and called for help at 3.30pm yesterday.
A fire service spokesman said: "We used a ladder to climb in an open window.
"I don't know who was more shocked, him or us, him to find four ugly firefighters standing in his front room or us to see him wake up!"
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