Kite like a man achievement
Solution 1:
"Kite Like a Man - Kill a tank only with damage from the original Survivors."
It's an achievement you can get only in "The Passing".
On the finale, the survivors from the original Left 4 Dead are helping you with shooting infected. The point of this achievement is to have them kill the tank, and them only shooting him.
Solution 2:
One of the easier ones. Gnoupi summerized it best. Just one addition:
Draw the tank to yourself and run around the generator until he dies. If he attempts to throw a rock, just stay right behind the generator and crouch.