Often times in sports we hear about "unwritten rules," codes of conduct that aren't mandated by the rule book but are generally accepted in the interest of fair play and decorum. Occasionally, there's some gray area surrounding these.

Intentionally stepping on your opponent's face, however, is just out and out wrong.

But that didn't stop Houston Cougar Aubrey Coleman from employing the dirty move against Arizona Wildcats star Chase Budinger yesterday.