Yep. That’s not the projectile. It’s the magna port slots lighting up before the gas really comes out. The projectile hasn’t yet exited by the looks of that. That’s the fun with revolvers and the big gas leaks from the chamber to barrel junction.
There were some LED lights going at the time and they just happened to shine on the back of his hand.
So many people at work look at that piece of road and said “I got booked for speeding along there!”