BOSTON (CBS) – Pete Frates is back home after a stint in the hospital.

His mother says he was treated for pneumonia — a complication of his ALS. Pete’s return from the hospital came the same day as the seventh annual Plunge 4 Pete was held at Good Harbor Beach in Gloucester.

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People dressed in holiday apparel took the icy dip to help raise awareness for ALS.

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Frates was diagnosed with the degenerative neurological disorder in 2012 when he was 27.

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He and his family launched the Ice Bucket Challenge phenomenon, which went viral and helped raise hundreds of millions of dollars to research a cure and help other ALS families.