[Backbiter is pointed down to the ground and non-threatening and he's listening, raising his eyebrows a bit. He's not discounting that Karkat might have been an alien (though it's certainly one of the more unusual theories) and he glances at the top of his head curiously before looking at his face again.]

The internet was supposed to be revolutionary. Wouldn't surprise me if it transcended time and space. [But...] Don't take this the wrong way, but you think maybe that's why Stabby McStabberson went after you? The mutant blood thing or whatever. [There's a pause.] You look fine so whatever happened hasn't transferred over yet at least.