Most likely scream "OP is a fig git rekt m8 69/10 - IGN #yoloswag420noscopefappingFaZemtndewdoritos" in their face along with one of my many alts. At least that's what I've seen throughout the years.
[spoiler]Not that I'm complaining or anything.[/spoiler]
I'd run at them screaming and then tackle them. I'd then throw them down a whole along with a sacred lantern of black flames to seal them in the earth forever.