After Voldemort uses the Avada Kedavra charm on Harry Potter, he's apparently dead on the floor, in front of all the Death Eaters.
-Quick, check if he's really really dead - Lord Voldemort says
-Er, boss, we don't know how to do that - Narcissa Malfoy answers - we forgot all our Muggle primary school education on, well, everything
-Yes, boss, I don't even remember what's the capital city of France - adds another Death Eater, visibly ashamed
Another Deat Eater half-heartedly kicks Harry on the butt. Harry winces
-Yep, he's dead - says - He's not cursing, although his left leg twitches a little bit.
-Well, for good measure, we'll use this Really Big Boulder on The Head charm. - a couple of Deat Eaters pick up a boulder, and smash Harry's head, breaking his glasses and spilling his cerebrospinal fluid in the process
-He's oozing stuff now. He's well dead.
Voldemort looked around and gave a few high-fives to his minions. He couldn't see Harry's scar now. All was well.