How did this happen?

So my friend corey went out last night and had himself one heck of a time, however when he woke up this morning he realized that he has a sizeable lump on his head and some pretty serious scrapes. He has absolutely no recollection of this ever happening and he is very disturbed by the whole situation, both physically and mentally.

So were asking you readers to put the pieces back together and try solve this serious mystery of how did coreys face get lit up like a christmas tree. So if anyone has any information regarding this incident please come forward and help corey end his confusion.

p.s. sizeable rewards will be granted for information