Booth had never acted in the play that was showing before the assassination of Lincoln .
`` Though he had never starred in the play himself , Booth knew the play by heart , and waited to time his shot with the laughter at one of the best lines of the play , delivered by actor Harry Hawk : `` Well , I guess I know enough to turn you inside out , old gal ; you sockdologizing old man-trap ! `` .
Assassination of Abraham Lincoln