Final answer:
The question regarding how Moira knocks on Sebastien's door cannot be answered with the provided text excerpts as they do not mention Moira or Sebastien. Instead, the excerpts contain various other characters handling situations that involve knocking on doors.
Step-by-step explanation:
Moira does not directly knock on Sebastien's door within the provided text excerpts, making it unclear how she would perform such an action. Instead, we see various characters in different plays and texts experience different scenarios regarding knocking on doors. From Hale who knocks and enters to find Mrs. Wright in Trifles, to Macbeth famously hearing the knock after committing murder, the act of knocking on doors serves distinct dramatic purposes, often signifying an impending interaction or the introduction of conflict.