All Khan proved is 4 things.

1. barrera isnt a natural lightweight (just like the pacman aint a natural lightwelter)

2. If somebody pours a pint of blood directly into your eye ball you cant see too good.

3. Khan is paying alot of attention to Roach in training and inbetween rounds and its helping ALOT
4. Khans speed and combinations are good enough to cause anybody problems ANYBODY.