Good thing she wasn’t a season-ticket holder.

Allison Barlow scored big at the Brooklyn Nets game Friday when she became Barclays Center’s 1 millionth customer — earning her two free tickets for every event there for a year.

Jaws dropped, lights flashed and streamers exploded in the air as the modest mom passed through the turnstile for her second Nets game at the arena — leaving her husband and friends who accompanied her stunned.

“I didn’t even know what was happening,” said Barlow, 50. “It’s kind of like a dream.”

– Reported by Corinne Lestch of the New York Daily News