You start with the protagonist in immediate danger or an outrageous scenario to force the audience to ask, "How did they get here?"

Let the audience know immediately if this is a comedy, a thriller, or a surrealist drama.

This structure drops the audience directly into the middle of intense action or a chaotic crisis.

For character-driven pieces like workplace comedies and family dramas, your opening needs to center directly on your protagonist's primary flaw or personality trait.