The document analyzes the opening title sequence of the film "The Purge" across multiple categories:
- It effectively sets the tone as a horror/thriller through CCTV footage style shots of violent attacks.
- The genre is clearly thriller/horror due to the violent crimes shown and fast-paced editing.
- Elements like dim lighting, weapons, and characters participating in violence immediately set the mood.
- The contrasting classical music against the violence creates an uneasy mood conveying the horror genre.