in 200-250 words please awsnser the question with references

When does an act in a sporting event cross the line and become a  criminal act? Is there a difference whether it occurs during a high  school, college, or professional competition? Why or why not? Why is a  fight in a hockey game essentially condoned (usually resulting in a mere  five-minute penalty) where the same act, even if consented to, subjects  the combatants to a crime of mutual combat?