2116830
It's an infinite loop back to the image. You scan the image, it takes you to the image, which takes you to the image, which takes you to the image.

Here's the link in the QR code:
http://xkcd.com/1237/scan/

2116830
I forgot. Hold on, let me scan it again...

1625426 I'll probably scan it later, unless it's a jumpscare or something like that. It's not a jumpscare, is it?

I foolishly scanned the QR code you have as an avatar...

Thank you for the kind words regarding P.O.N.Y. You are very generous.