I love the part where he shows a green lightsaber symbolising jedi and I like how he thinks he is in company of another jedi but in reality it was a trick.
This really grasps how much of a threat and an actual menace grievous was to jedi..man's kept sabers as trophies and actually used them against other jedi..this even shows how he likes to toy with his victims..he ignited the green Saber to make this jedi think it was another jedi at the end of the hallway..then as his Saber ignites the ground beneath him he realizes the true owner of that Saber lies dead at his feet. Then the fear sets in and grievous just laughs menacingly as he ignites his other three sabers, putting the fear of God into his next victim.