The other day I was laning with some Sven against a solo Huskar. Whenever we went to kill him, the Sven would iniate with his stun from max range then Warcry and run all the way to him, hit him 2 or 3 times then die, then I'd die trying to help him.
And no matter how many times I told him to save the stun until he is low, he just didn't listen, he fed the Huskar this way about 4 times in the early game.