When you are killed by rifle your screen just goes blank and you stare for a few seconds. Which is cool. But when you're blown up (like crashing in a chopper) the blank staring is just confusing especially when you're still sitting there in a chopper that's suppose to be completely destroyed bouncing around for a few seconds. I think the instant you die a silent black screen could happen until the menu pops up with the "death cam" that floats up and around to show you your wreckage. A head shot would be a cool effect to do this with too. Anything that is in reality an instant death (vehicle explosions, head shots, other explosions...) maybe a grenade shouldn't, or a claymore. Those things including kill shots to the chest, things that would leave you 100% incapacitated and dead in seconds, can go to the clear screen where you can't move you just stare.
Anyways. It'd be nicer.