Great video, the nature article is much more informative than the one linked. From the nature article, it seems this was the first video of natural bidirection

Great video, the nature article is much more informative than the one linked. From the nature article, it seems this was the first video of natural bidirectional lightning, not triggered by rockets or aircraft: "In contrast to studies of rocket-triggered lightning and lightning initiated by aircraft, which found delays of 3–6 ms between the onset of negative and positive leader branches, this natural event exhibited a delay of less than 90 μs (i.e. one video image)." This was a negative polarity lightning strike. the most common type. Less than 5% of lightning is positive polarity but they can carry ten times the charge and exceed a billion volts of potential. When you read about people surviving lightning strikes it's almost certainly a negative polarity strike. https://en.wikipedia.org/wiki/Lightning#Positive_and_negative_lightning https://en.wikipedia.org/wiki/Lightning#Positive_and_negativ...