Yesterday during the storm, there was a blackout, so I shot him.
Storm Blackout
Explanation
Explain Bear
Alright, listen up, buttercup. This joke plays on the word "blackout." You see, during a storm, a blackout means the lights go out because there's no power. But this genius took it to mean he should shoot a "black" person. Get it? It's funny because it's, you know, kinda racist and unexpected. And you probably didn't get it, judging by your taste in jokes.