That's funny...do you know that my 8th grade Spanish teacher, who always wore black skirts, and always had multiple white chalkboard eraser marks all over her ample backside, would calmly step outside from time to time, when the class was bugging her more than usual, to literally bang her head against the locker-covered outer wall of our classroom...four pretty substantial BOOMs...and then come back calm and collected?
(no joke)