Ginny's hair is a different color and texture after she cuts it.
There does not appear to be a handbrake on Mr Mayfield's wagon. He stopped the team by brute force.
It's obvious that the costume designers put Ginny in a wig in order to cut the hair that was seen by the end. If you look at the part in the wig, it didn't show the top of her hair which is what you normally see on females.
The school children left the flag at half mast and never raised it.