We see the gun go off in James’ trembling hand. The muzzle flash is done with the PROGUN plug-in from PixelFilmStudios.com. I love the contrast of the yellow gunfire against B&W.
At 8 frames, this is probably the shortest shot in the film. That’s 1/3 of a second at 24 FPS (frames per second). But the jolting sound effect really sells the fact that James is at a minimum intoxicated and should probably be reported to HR.