It's even more awesome when Trunchbull smashes the glass platter over his head. While that is a bad thing to do to a kid it gives two more awesome points for Bruce: 1. Being that he is durable enough to take a heavy glass platter over the head with nothing short of a loud belch. 2. It gives Bruce the satisfaction that the aforementioned action meant he got to Trunchbull showing us a glimpse of her Villainous Breakdown.
He gets a second moment at the end. As all the kids are throwing water balloons, he smears a cake across the Trunchbull's mouth.
Miss Honey also gets a slight one when she finally stands up to the Trunchbull.
Miss Honey: I am not seven years old anymore, Aunt Trunchbull.
Miss Honey also gets one in both the book and the film when she calls Mr. Wormwood out for considering some stupid T.V. show (in the book, it was a soap opera; in the movie, it was a televised boxing match) more important than his daughter.
And again when Matilda's dad makes disparaging comments about college-educated people and Miss Honey points out that educated people have a place in the world (if, Heaven forbid, Matilda's dad had a heart attack, the doctor that cared for him would have been college-educated or, if Matilda's dad was sued for selling faulty cars, his lawyer would have been college-educated).