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Adrienne Lett had gone to bed around 10 p.m., but was awakened by a banging noise sometime after 4 a.m.

Lett woke up her 30-year-old daughter, and then called her brother, who lived nearby.

Lett guessed that the smoke had put her and her daughter “in a relaxed mode,” and said the man who banged on the window had saved their lives.

A video Lett shot at 4:54 a.m. showed a pitch black street.

Adrienne Lett was asleep in her Altadena home when she heard someone banging on her window in the predawn hours of January 8.