You know when you damage somebody and your fatass is like, "Why the HELL aren't they dieing, I just pumped 50 bullets into this scrub?" Well, my fatass has a solution and explanation. There are lag spikes that happen in Crucible, and what I mean by that, is that if theres two or more players with connection that doesn't correspond with the others, that player is temporarily invincible until that lag is resolved, but is usually rendered immobile. This has been happening with bungie's multiplayer games since Halo 3. They think it is unfair when somebody get killed by another with better connection, this is why it usually happens on 360 and PS4. Doesn't help that it happens on the Trials, and or even The Lighthouse.