Ive had it happen to me once on upheaval, i was trying to shoot a sniper with my M1A1 with stopping power, and i knew that i would have to shoot in quick succession else he would get away, i clicked it as fast as i could and it was about 2 bullets a second, and i was like "WTF", then someone with a gewehr went up to me, killed me by knifing me but first shot me a couple of times, in the kill-cam, i saw him shoot once, then once again about 2 seconds later then run up and knife me even though i was shooting at him, i think its Treyarch's failed attempt at stopping the turbo controllers!