Yes, I know that in this case Kayneth survives, but it was the best video I could think to illustrate the situation in which an arrogant Magus/Sith/Jedi has the absolute certainty that their mastery over the Magic/Force makes them unbeatable, and then someone finds an easy and effective way to pass through these defenses and blow them sky high.
To discuss ruthless pragmatism it may have been better this video, in which the End dies of old age in MGS3, if you wait a week, but it wasn´t as aesthetically appealing as the other one...
But it also is very good to show how the most pragmatic route is usually rather low in emotion, epicness and fun, and it can be quite boring.