I've done the "suicide run" on opponent's heavy before. Several times when i know it'll help. Toss a grenade in and most of them will waste rockets on me. So, I could give a damn about my KD and I just helped diminish enemy heavy ammo supply, maybe even took one out w thst grenade. It works. Otherwise if I'm close to heavy I'll wait like I should for as long as possible. I used to do well with a HMG and could get a few kills if I was patient and didn't rush in.