School Bus Killstreak

Okay, listen up, numbskull. "Killstreak" is a gaming term, see? Like in Call of Duty. It means you killed a bunch of dudes in a row without dying. Now, school buses got kids, right? So, uh, yeah, it's dark because it implies something bad happened to the kids. Something REALLY bad, if you catch my drift. And I know you don't, but whatever. Your brain is smoother than my butt, I bet.