One Reddit user went through his physics text book and put captions on its stock photos with Snapchat.
You've probably seen this photo if you hang out on Tumblr or Reddit. It basically started the cat-selfie genre of Snapchats.
As Karma Decay shows, this photo gets posted to Reddit every few months as people try to take credit for it.
It's also the first result that will show up for a Google search for "cat selfie snapchat."
As far as we can tell, Deanb1307's post to Reddit was the original source for the photo.
This guy used some impressive footwork to take a picture that didn't look like a selfie.
Here's the Know Your Meme article about "Bae Caught Me Slippin" if you don't get the reference.
Come people read books or check emails on the train. Others spend their commute Snapchatting strangers into works of art.
This is why you don't get your parents hooked on popular apps. I'm glad I didn't have to see my dad awkwardly taking selfies when I was growing up.
Make sure you type in your friends's usernames correctly. You don't want to message a stranger by mistake.
Tim Pyatt's Snapchats are famous enough that he had to start watermarking them so he'd get credit when they got picked up on Facebook and Twitter.
Here's a photo of the pirate from Spongebob Squarepants for comparison.
Click here to see Tim's first collection of Snapchats.