Artist David Aja and 46 other comic creators collaborated on the "longest comic ever," ¡Caramba! 2. And we're talking "long" in actual length, not page count. As you'll see in the video above, the comic is on a long scroll of paper and you unroll it to read it. The comic and the site where you can buy it are in Spanish, but you can find out more about both here if you know the language or want to decipher what Google Translator gives back to you.
These Harley Quinn & Poison Ivy #2 Variant Covers Are Music to Your Eyes