Was out shooting with a friend today and he had an app on his phone that would take slow motion video. He was taking videos of me shooting to show me how it worked. Pretty neato. After watching a few it occurred to me that this would be VERY useful in diagnosing form errors and observing what the rifle is doing under recoil.
I uploaded one to YT so you can see: https://youtu.be/9xDZoHAJkU8