Superheroes are, apparently, no longer a thing of comic books and summer movies. At least, that's the claim made by a new video that's appeared on YouTube, which is supposedly footage of a real-life superhero defending student Alex Cerneka after he was stabbed twice in New York last week. But just how real is the video?

Google pulls up nothing about an Alex Cerneka being stabbed nor defended by a superhero in public, for one thing. And similar searches for real life superheroes offer up nothing helpful. So what's the deal with this whole thing? The video was uploaded on Tuesday by someone who joined the site the same day, so there are no clues to be found from previous videos, but perhaps there is one to be found in the user's name, "baronzzemo1988". Baron Zemo is a Marvel Comics character, and the idea of a real-life superhero is central to a new comic book announced last week by Marvel, called Kick-Ass:

Unmasking the "Real Life" Superhero Who Stopped a Stabbing on YouTube

Have you ever wanted to be a super hero? Dreamed of donning a mask and just heading outside to some kick-ass? Well, this is the book for you—the comic that starts where other super hero books draw the line. KICK-ASS is realistic super heroes taken to the next level. Miss out and you're an idiot!
Realistic super-heroes taken to the next level? The already tired viral video marketing level, perhaps...?