This end credit song for The Disney Channel Original Movie Phineas and Ferb: Across the 2nd Dimension features none other than Slash. On the collaboration with the former Guns 'N' Roses guitarist, co-executive producer Dan Povenmire explained, "Slash is a rock icon, he's our hero. We wanted a song that encapsulated the feeling of the series as well as the movie. Slash saw the movie with his kids and he liked it so much, he said, 'Hey, let's write a song together!' It was really a dream come true."
Regarding collaborating with Povenmire, co-executive producer Jeff "Swampy" Marsh and composer Danny Jacobs on this tune, Slash said, "Working with Dan, Swampy and Danny Jacobs was just great. They're a very talented couple of guys. It was really easygoing. I had a guitar riff and they came up with lyrics and melodies instantaneously. Kids will dig it because it has a lot of energy and the song has a great hook."
A cartoon version of Slash also appears in the song's music video. Said the guitarist: "I'm a big fan of Phineas and Ferb. I watch a lot of cartoons and I think it's one of the best shows. It's well-written, very original and the characters are great. This whole experience has been surreal because I'm a big Disney fan. To be involved in this movie and having written some music for it is pretty exciting. It's an honor to actually be animated in the 'Kick It Up a Notch' music video."