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A comment on Ask HN: How were the super bowl led torches synced?. Parent comment

Re:Ask HN: How were the super bowl led torches synced? by kevinliang on Monday February 06, 2017 @01:22AM (#13577003)
The dance was rehearsed ahead of time and the torches get lit via infrared sensors. (I magically discovered the infrared when I was pressing my TV remote and it just lit up).
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