2006, Gym Class Heroes released As Cruel as School Children. The record contained guest appearances by Patrick Stump of Fall Out Boy and William Beckett from The Academy Is.... The album marked a departure in the band's sound, with the band utilizing drum machines and synthesizers as opposed to the band's typical live instrumentation. The band also gained popularity when McCoy was featured in the Cobra Starship song "Snakes on a Plane (Bring It)", which was featured on the soundtrack to the film. 2008: The Quilt After headlining a seven-week U.S. tour called the "Daryl Hall for President Tour '07", the group returned to the studio to record new material. The resulting material became The Quilt, which was released on September 9, 2008. The album featured numerous collaborations with other artists, including Daryl Hall (from Hall & Oates), The-Dream, Estelle, and Busta Rhymes. Guitarist Disashi Lumumba-Kasongo said of the album, "I would definitely say that this is the most collaborative album I've played on with the band. I remember the very first day we started jamming out and working on the songs. I thought, Man, I haven't felt like this since I was in high school jamming out in a garage. So it's kind of cool, 'cause it was that same feeling, except we were recording for a major album." Gym Class Heroes co-headlined the 2008 Warped Tour along with Fueled by Ramen label mates Paramore. While the band was performing onstage at the festival on July 2, 2008, Travie McCoy was arrested after hitting a man on the head with his microphone. The man had been in the crowd at a concert in St. Louis when he shouted racial slurs at McCoy. McCoy asked the man, "What did you just call me?" As security was removing the man from the venue, McCoy brought the man on stage to call him out in front of the crowd. In a statement, McCoy's publicist said that the man hit McCoy's knee, which was in a brace after he had suffered a recent strain. 2009–2011: Side projects Travie McCoy has pursued a solo career. In 2010, he released a hit single "Billionaire" with Bruno Mars, which has been successful since its UK release in early May 2010 and also featured in Taio Cruz's single "Higher". He released his first solo album, Lazarus, on June 8, 2010. Lumumba-Kasongo created the side-project Soul in 2008,