The primary impact on the mediated context of content during the parenthetical period is containment. Look at a printed work, Pettitt suggested, and you will see strict regimentation. Words are forced into lines, surrounded by margins, placed on pages that are sewn into a binding, contained by a jacket and placed on a shelf where they can be contained and controlled. The words have been "imprisoned" and have lost much of their pre-parenthetical fluidity. This confinement of cultural production has obviously not been limited to the written work: plays move to stages and music to concert halls during the parenthesis.