When the shock that Harry was alive wears off, everyone (except Harry and Voldemort who are now dueling) don’t really know what to make of it. That is music starts playing from somewhere and someone yells “DANCE OFF”. The death eaters and Purebloods are - understandably - confused until a lone student moves forward and starts breakdancing. As more people join her the death eaters decide that this cannot be. So they start waltzing with each other as the students and a few teachers have taken their turn in this ‘dance off’ as they call it.
' Are…are they waltzing?’ Asks a very confused Dean Thomas, to Neville Longbottom.
“Yes Dean they are. We can’t let them win this dance off” Neville replies with that, and he goes over to Ginny who is conversing with Colin about what to do now.
When the death eaters are done with their waltz they go back to their previous spots near the edge of the claimed space for the dance off; and as soon as they do, a hufflepuff muggle born named Quinn Hawksley, a girl in Ginny's year steps forward and declares: “ May the last one standing win this war”. When she is done speaking she steps back to let the others come forward.
Everyone is Dancing in different styles. The Death Eaters only seem to know how to do ballet and waltz though. Eventually people on both sides grow tired of dancing, and leave the dance floor.
At this point the dance off has been going on for at least an hour (it hasn't, it has been going for half an hour at most, but the people who think it was only an hour at this point got tired very early on). About half of the Death Eaters and three fifth of the students are left on the dance floor. All the teachers left the dance floor for reasons akin to: “ my knees won’t let me do this like they used to”, “ I am choosing to stay out of this and make sure that no one gets hurt’ , or “ with all of you moving like that I will end up crushed.”
Twenty minutes later, another half of the death eaters have left the floor, leaving only a fourth of what the group started out as. (About 20 or 30 left standing.) The students have ‘lost’ about two thirds of what they had originally, leaving about fourty or so students standing. Everyone needs water, Mcgonagal is getting that and food from the house elves for everyone (except for the death eaters because this is still a war).
Ten minutes later, only two remain. Luna Lovegood, and Steven Rowan. One from each side of the war. Everyone is waiting in suspence to see who will win, when there is a shout of “ what the fuck is happening???” Coming from none other than Harry Potter himself, who it seems in the past hour that this dance off has been happening has defeated voldemort…..again; and is now paying attention to what everyone else is doing. (for once in his life)
“ A dance off. Duh.” States Ginny
“But why?”
'What else were we supposed to do? duel them?’
“Yes???”
Ginny blinks, “ oh well at this point it doesn’t matter so shut up and watch with us to see who wins.” Harry grows strangely silent.
It takes another 15 minutes before Steven falters in his steps. So he gives up and walks off the dance floor. Luna however shows no signs of stopping anytime soon. Eventually. Ginny and Neville go up to her to tell her that she won them the war.
-END-
Its safe to say that after this experience dance offs became the new custom instead of duels in the wizarding world.
Mcgonogal now teaches a mandatory dance class to all incoming first years.