No sure if intended behaviour but it looks like a bug.
When you die your killer’s muzzle flash renders over everything else.
What I mean by that is that if you move the point of view of the “death cam” the muzzle flash does not get hidden if a wall (or any other element) comes in front of it. The muzzle flash is always the topmost element displaying.
[video=youtube_share;BU121Npyf9I]http://youtu.be/BU121Npyf9I[/video]
[video=youtube_share;4mdh5K_nScA]http://youtu.be/4mdh5K_nScA[/video]