I remember how I once annoyed the crap out of this guy on this jungle map with lots of bushes.
It was 1 on 1 and I had a sniper, while he was running around with an auto.
I first hid myself in a bush and camped and killed the guy. Then while he was respawning I quickly jumped into another bush and then ambushed him from there while he though I was still in the previous one (he shot at the bush) and I kept doing this for 12 kills until he simply left in frustration. T'was fun.