There's two major category terms for errors, particularly as applied in aviation. Comission and omission. The CRJ flameout is essentially a comission error. The KLEX CRJ was omission. Of course, neither category is completely immune from experience levels. Although "messin around" seems to be more common to less experienced, or rather more succinctly, less mature individuals. (Sure, there's some exceptions to comission errors - anyone remember the infamous "Detroit diver" 727?)