In 1998, Mike Portnoy invited bassist Tony Levin, guitarist John Petrucci and keyboardist Jordan Rudess to form the supergroup Liquid Tension Experiment. During the recording sessions for their second album, Petrucci had to leave due to his wife, Rena, going into labor. During that period, the remaining LTE members, who still had studio time booked, continued to write music in improvisation. On 23 October 2007, a compilation of jams from those sessions was released under the name of Liquid Trio Experiment. The album will be called Spontaneous Combustion. A few songs from Liquid Tension Experiment 2 were spawned from these jam sessions including "914", "Chewbacca", and "Liquid Dreams".