Cats rule the Internet, so it’s no surprise that when the Internet Cat Video Festival started selling tickets, they sold out a month before the festival. Even more surprisingly is that people started selling and buying tickets to the festival through Craigslist.

“Jesus, it’s harder to get tickets to this than Burning Man,” Annika Bastacky said, looking around the packed theater. “Do you know what this is exactly? I’m going into this blind.”

When asked to explain the popularity of the Internet Cat Video Festival, Jane Super, a bartender who runs the Cat Museum of San Francisco and has several real cat tattoos, said, “You can’t take your cats out in public like dogs, so the only way you can share is through the screen.”

To read more about the Internet Cat Video Festival, click here.