DD is 4 (August baby). And I did probe trying to see if she provoke something but it doesn't seem like she did and to be honest I would be shocked if she did. She is a sweet, quiet little girl. She never acts out in school and every day she comes home with the perfect '5' for behavior. This is why I was shocked at her behavior last night. I have never seen her so angry.

I do like your ideas about talking to her about how to handle the situation the next time. She might be more willing to talk.