Voldie: Oh, stop this foolishness! AVADA KED--OWW!!
Nikola: Oh, I'm sorry--did I hurt you?
Voldie: Get your vampiric claws away from me!
Nikola: Oooh, afraid, are you?
Nikola: Go ahead. Try and kill me. There's nothing stopping you.
Voldie: AVADA KEDAVRA!!!
*spell bounces off Nikola and back to Voldie, killing him*