I once had four cops knocking on my door and I was in a really bad mood. I started to fight. Two cops grabbed their gun and the other two went into full combat mode on my ass. They could have easily shot me, but I had no weapons.. I went full retard on their ass and kicked them off my property. The two other cops with the guns in their hand kept yelling, but I didn't give a flying fuck at the time. I kicked the two other cops untill they left my property.. 
Could they have killed me. Yes. Would it be legal. No and yes.. A good cop only use a weapon when in fear for his life. Afterwards in court one of the cops that was holding a gun gave a statement that helped me. Because they could only fire a gun at me when their life was in danger. But the cop told the judge that they didn't fear for their lives... 
It was a very lucky day for me and now I respect cops that know what they're doing. It was a lesson for me, but also for them. Now, years later, those same cops make smalltalk with me and with one of them I became good friends. 
It's a strange world sometimes. 
