My home is being invaded. I confront the guy.
Several things could happen.
1. I'm going to either startle the guy, or he sees me, and get shot immediately.
2. He doesn't shoot me, and I ask him to leave.
3. He leaves and it's over with. I call the police and file a report.
4. He refuses to leave. I ask again. Still doesn't leave. At this point, all he should need to hear is the "ch-ch" from a shotgun, but if that doesn't work, he better watch out. I ask him to leave one last time. Still won't leave? Now he wants to harm me and get violent. Well, I hope you like buckshot being implanted into your brain.
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New scenario:
Your car has been stolen and driven into a lake.