Something never to say to a cop, or someone with a gun: “Oh, you’re gonna shoot me?”.
You are not speaking to an equal. The authorities do not tolerate sarcasm. As i have suggested before, many police do not allow you any rights, and that includes living.
On December 6, 2013, in Alamo Heights Texas an University of the Incarnate Word cop, Chris Carter, killed an honors student, Robert Cameron Redus, off campus. A witness said, “He emptied the gun on him”.