I heard of it too. Never found out, never seen it, noone scared of it. Noone explaining this technique. I think it's a fake. And, btw, if it's true, it's not that bad. Vhosythe is slow, you know?
I may have heard of it. I heard that if you hit someone while your going up a boost pad (like in those thin tunnels in sic transit that go to the broken bridge) you'll hit their weak point point for massive damage.
I can't remember if they said it did a whole lot of damage or if it was an instant kill. But I think I tried it once and it didn't work. I'll try it again soon to make sure.