Final answer:
Marcus is mad about the accident involving Trina's fall and losing a tooth, demonstrating frustration rather than concern, and seeking validation for his feelings.
Step-by-step explanation:
The Marquis's attitude toward the "accident" seems to be one of exasperation and frustration. Marcus expresses his feelings vehemently, suggesting that he is mad about the situation. Despite the serious nature of Trina's accident, where she fell from a swing and knocked out a front tooth, Marcus's primary response isn't concern for her wellbeing, but rather anger at the circumstance.
He seems to be more upset with the fact that the accident occurred than with the actual consequences of the accident itself. His repeated questioning "Ain't it?" seeks affirmation for his feelings, expecting others to recognize the severity or the frustration of what has happened. This reveals a side of Marcus that is emotionally driven, possibly impulsive, and looking for validation in his response to the accident.