I had the bounty to get 5 Postmortem kills. I run a GS hunter with exotic arms and use tripmine. I capped B on Firebase Delphi, then 5 of their team rush me. I jump and lob my tripmine randomly not hitting anyone. I die and then respawn and run towards B again. A Titan drops his bubble shield, and my tripmine is somehow inside it. 5 of them go inside the bubble and hit the mine, killing all 5 lol. Got like crap ton of medals and the bounty done in one shot haha