Spontaneous Combustion is the result of the studio improvisations which occurred while John Petrucci was with his wife who was giving birth. The trio of Mike Portnoy, Tony Levin and Jordan Rudess continued to write music during this period. It was released on October 23rd 2007. A few songs from Liquid Tension Experiment 2 were spawned from these jam sessions including "914", "Chewbacca", and "Liquid Dreams".