One shot 3 hs kill with m4a1?

Aligning 3 people to do so? I feel lucky lol
http://www.mediafire.com/download.php?yj2xjiztfzo

Use the replay screenshot to see where you need to pause when I get the 3 headshot kill. Pause the game and look exactly where the other 3 people are aligned. Look at the in-game screenshot to prove that it was just 1 shot...and went through walls. LOL!