The video from the last test of Trident D5, launched from offshore, was unreal.
Someone happened to catch it with a good lens from a fairly dark hilltop, and then spacecraft experts annotated the video to point out what was going on.
You could see the bus rotating and ejecting warheads (or decoys) all the way through its inventory. Amazing.
I'm told by family that it's even more amazing to see the RVs re-entering overhead if you are lucky enough to be downrange during a test.