This happened on New Years Day, 2016. I'm not saying this justifies cops using excessive force at all times, but if you've ever wondered why cops seem trigger happy, it's because they show you shit like this in training school on what happens if you hesitate to act or give suspects the benefit of a doubt:
The officer shot miraculously survived and the guy got 35 years in prison, but holy shit, this footage is scary. If I were him I would have tazed the guy as soon as he ignored my first warning.