More on this photography technique here...

https://www.caltech.edu/about/news/u...-and-phenomena

Just to put things in perspective...

The speed of light is approximately one foot per nanosecond (thank Admiral Grace Hopper for that handy relation)

According to the counter in the upper left of the video, the sequence lasts about 30 picoseconds

30 picoseconds = 0.03 nanoseconds

So, in one increment, the light moves about 0.03 feet = 0.36 in = 9.1 mm