You notice a tall, teenage guy, with black-blue-ish hair and a white streak in an allyway fighting something that looks like a vampire out of some books or stories you've read / heard.

He turns his head slightly and catches a glimpse of you before he decides to focus on fighting the vampire first instead. You weren't sure what was going on, but, you couldn't help but peak around the wall of the building you were standing behind to watch just a little bit of the fight going on in the allyway