Highest launch from a Galilean Cannon 

A collaborative effort between the North Carolina Science Festival, the #UNC - Chapel Hill Physics and Astronomy Department, and the University of North Carolina resulted in setting a new world record for the highest launch from a Galilean cannon: 13.08 m (42 ft 10 in). The record was achieved and recorded 6 March 2020.
While we had many human witnesses for this event, accurately measuring the height of the projectile was very difficult because the projectile is very small (difficult to discern against a busy background), it never launches to exactly the same location twice (you cannot know ahead of time where to set your gaze for the apex), and the launch velocity is extremely fast (so even though the starting point of the launch is known, it's virtually impossible to follow the trajectory with the human eye).
To solve all these problems and record the world record, I brought a high-resolution camera (a RED MONSTRO 8K VV camera) matched with a very high-resolution lens (Tokina Vista Cinema Prime 50mm prime lens) and shot vertically at 120fps (5x faster than real-time). The video footage provided all the necessary evidence for the team to measure and document this new world record.
It was a #GDTBATH (Great Day to be a Tar Heel)!
Here's a link to our entry in the Guinness Book of World Records:
www.guinnesswo...
This was the third time I've created video documentary evidence for a world record. The first two times I recorded my brother setting some juggling records (13 balls flash tying WR, and, separately, 9 sticks, setting WR). See • 9 stick flash: New wor... , for example.