Final answer:
Although the most exciting part of Alice Gerstenberg's play 'Fourteen' isn't specified, excitement in plays typically comes from plot twists, character revelations, and climactic scenes, as seen in the provided excerpts of other plays.
Step-by-step explanation:
The most exciting part of the play Fourteen by Alice Gerstenberg isn’t clearly defined as the excerpts provided present scenes from different plays and a reflection on the dramatic elements of plays in general. However, exciting moments in a play often include significant plot twists, character revelations, or climactic events. In this context, looking at a play’s storyline, the most thrilling moments could arise during an evocative scene such as a fancy-dress ball designed to surprise characters and the audience alike or during tense, quietly dramatic moments such as Mrs. Linde's silent anticipation and listening for a sound at the outer door in A Doll's House.