Jeffrey Vanchiro, the Brooklyn Nets superfan known to the team’s fans for his exuberant dancing and cheering at Barclays Center, died Sunday after he was injured in a fall from a window at his father’s house in Flushing, Queens.

Vanchiro, who was 38, was placed in the intensive-care unit at New York Hospital Queens late Saturday night after suffering life-threatening injuries in the fall, according to a person familiar with the matter.

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