Harrison popped the kid in the head with her elbow (
video), apparently inadvertently, and the kid got in Harrison's face then Harrison got into it with the kid. "This stuff happens" says Rebecca's co-host (is that Carolyn Peck?) - really? Not in women's basketball and only to undisciplined teams.
As to Harrison and the physical play, that's what happens when you're the best player on the team. Suck it up. Diana Taurasi was eternally black and blue, Maya Moore needed to wear rib protectors she got so beat up, and Breanna Stewart can't move a foot without at least 2 players draped on her. Tennessee wouldn't last a season in the old Big East if they can't handle a physical team.