I remember seeing that scene when I was a kid. It is still awesome! Interetingly enough when I joined the forum I tried to make a screen shot of this scene my avatar but was too stupid to figure out how to make it fit.

On the Gun Zone, there is a good section on that scene and there is a piece where Zubiena explains the actions of his character.

After apparently killing the chauffer offscreen, he kills his target w/ the shotgun then does a failure to stop on the security guy. He ditches his gloves and weapon to blend in. He clears the pistol so no one can use it on him as he leaves the scene.

In the final shootout of the episode, it's interesting to see that once his character realizes he's in a stand up fight he tries to break contact.

Nice to know Mann has always been consistent on his technical stuff.