Ok this is a funny one. I was casually doing a KF raid and my group was on totems. I was in the middle with someone else and that someone else popped their bubble so I thought I could take a few knights out with my sniper from about halfway out of the bubble. I lined up the shot aaaaaaaaand... I died. Turned out I wasn't far enough out of the bubble. Normally just shooting the bubble wouldn't kill you but I just so happened to have the armour piercing and ricochet rounds perk enabled on my sniper which made the shot from inside the rubble deflect and kill me. Me and my team were dying laughing for a good 5 minutes.