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Saying you'll blow the top of someone's head off like that congresswoman who got shot in the head by some idiot who didn't know how to aim.
You better shut up or I'll blow your head off like that congresswoman who got shot by some twerp.
I'll pop your head like that lady who got shot in the head during that whole Tucson mess.
If you don't back down, I'll shoot you like that congresswoman who got a bullet in the head from some random lunatic.