Well IMO that COULD cause harm to another player. You're not expecting that, Hunter could have easily lost his balance and gotten hurt falling.
It's one thing to have the ball and stop in front of another player to draw a foul, it's borderline but players have been doing it for ages it's part of the game. Running alongside a guy and essentially dipping your shoulder in front and diving into him is something else entirely.
An aside but that's the primary reason so many non arizona fans can't stand Kerr Kriisa in college, he just jumps in front of people running downcourt, without the ball, completely uninvolved in the play and tries to get a charge. Very dangerous.