Rather than trying to touch the bar to your chest or reaching your chin over the bar (both of which can produce dysfunctional mechanics), the goal should be to achieve proper upper back and lat activation. This requires several components.
Thibs is a sadistic SOB because he's always glad to bring more pain your way. This time the red glow of his laser sight is dancing around your chest and he's ready to pull the trigger.
Finally, some ammo to use against those putzes who insist on benching with their feet in the air. Craig also makes the case that chin-ups are a better lat exercise than pull-ups. Let the arguments begin!