Just a Nosebleed

One Defense Against the Dark Arts lesson, Barty Jr decides to try and teach the Fourth Year Gryffindors the Killing Curse. He doesn't expect anything to come from their feeble attempts. But when the unlikely happens and leave 8 Fourth Years with a dead body, things look grim for them. But maybe Albus Dumbledore with the help of some friends can help. Expect lots of shenanigans.