I got one myself. I was playing Dystopia earlier tonight. We were the Corps, they were the Punks. My team was rushing toward a Jack In Point, trying desperately to stop the enemy from killing our Decker. I was playing as a Heavy, equipped with the Basilisk. As we ran into the tiny junction room, I ran out of ammo and was promptly gunned down by an enemy Medium along with a teammate. However, he was killed a few seconds after I had died by my Spider Grenade.
Thing is, I deployed said grenade completely on accident. I had been trying to switch to my hydraulic punch. I literally said "From beyond the grave!" out loud as it happened. I couldn't help but laugh as the poor bum's body was blown in half.
Another thing: The Spider Grenade's explosion somehow managed to NOT hit any of my still-alive teammates.