There was one time not too long ago, I was playing Halo: Reach, the Tip of the spear mission, I was at the last anti-aircraft gun before you get into the falcon with Jorge, I was on Legendary, I picked up a needler rifle drop shield and a plasma pistol, the last wraith's gunner was replaced by an elite, I walked towards the wraith shooting the gunner and as the wraith shot at me I immediately put down the shield and it absorbed the shot, destroying the shield, I quickly continued shooting the elite, and killed him, used the plasma pistol to stop the wraith and planted a grenade on the back. (crap I think that's too many words...)