The Main Monkey Business is an instrumental from Rush's 2007 album Snakes & Arrows. It clocks in at 6 minutes and 1 second, making it Rush's second longest instrumental, the longest being "La Villa Strangiato". Drummer Neil Peart remarked that it took him three days to learn the song.In a recent interview on HDNET, Alex Lifeson and Geddy Lee stated that the song found on the CD is a toned-down version of the original one. They referred to the original version as "crazy".