Tom Clancy's Splinter Cell Easter Egg - Resurrection?

In the final mission of the game you have to kill, using the sniper scope, the "bad guy" of the game. Sorry but I can't remember his actual name. After you have taken him out, instead of escaping from the embassy, return to the very first room of the level (the one that you spawn into). I think you might be surprised with what you'll discover...

Note by JPhinfan86: When you return to the floor indicated you'll find Nik standing there in the dark. I found this years ago, and he actually surprised me enough to startle me. If you kill him you still have to snipe his noggin' from the balcony like normal. Essentially you can kill him twice in the same mission in two different places.