Kangaroos are sometimes aggressive towards people and this kangaroo definitely doesn't like the sight of this flying human and tries to attack him.
If you guys don't know, Bouldering is just rock climbing on small rock formations or indoor rock walls without the use of safety equipment such as ropes and harness.
The girl couldn't reach the artificial rock she was aiming for and so fell. If you play the video frame by frame, you can see that she landed with her right arm first causing it to break.
hey now you're an all-star, get your game on, go play