Doc Drew, I've experienced a very few times the slow motion effect, but when I see a shot cloud, or see the rotation of a clay target, it's not like that. It happens in such a brief microsecond that it's hard to describe. It's over before it registers in my mind that it's happening. Mark II describes what I see as well as anything I've ever heard or read.
I also have watched bullets in flight many, many times. I used to compete in IHMSA pistol competition. We shot at silhouettes up to 200 meters, and utilized a spotter who was watching through a spotting scope. The flight of a centerfire bullet could be clearly seen from about 50 meters all the way to impact, or miss, at 200 meters.