Sadly, I am proud of this “unlucky” shot.
https://halo.xbox.com/en-us/haloreach/ME720/fileshare#?details=8747867
EDIT: This happened to me in a Matchmaking game of Firefight, and I have the segment in my file share.
HAHAHAHAHAHAHAHAHAHAHA! How could someone manage that? Thats probably the worst case scenario when fighting someone. Now you got a teammate who wants revenge. Haha
Thats pretty funny… Well, I guess if your intentions are to betray someone, some will get betrayed even if its not who you originally intended to kill 
WOW! That’s the most amazing shot I’ve ever seen. The chances of that happening are so low it’s hilarious.
Amazing!
Were you playing against players or firefight? Its still funny even after looking at it a lot. Rooster Teeth should have a screenshot fail of the week series. This would make the first photo for sure.
The story behind it is that one of the challenges of the day/week was to complete a round of Firefight without dying. The person I am trying to shoot had betrayed me with his sniper (likely on accident), so I went to get revenge. And in the end I did end up betraying the guy I was trying to hit, and I got booted instantly.