Pillars

Two people are selected to be the pillars and are instructed to sit on either side of the stage. Two actors then begin improving a scene and at various points throughout tap their "pillar". Whenever one of the pillars is tapped they must say whatever word they are thinking of and the actor who tapped them must use that word in the sentence at the point they tapped their pillar. The pillars basically provide fill-in-the-blanks for the actors whenever a pillar is tapped.