Footfalls above "we would see the tracing on the stage floor of a tremendously elongated variation of the figures 8 turned on its side … the mathematical symbol for infinity." Beckett was also indebted to the French psychologist Pierre Janet for his conception of hysterical behaviour. In his overview of Janet's work, Robert Woodworth in his "Contemporary Schools of Psychology", a work Beckett read, pays particular attention to Janet's description of the "hysterical paralysis of one arm", which Beckett incorporated, into May's posture. There are a number of analogies between "Footfalls" and Janet's work with a patient called Irène: He lists
Infinity on High and all reaching international charts. "Infinity on High" was spurred on by the lead single "This Ain't a Scene, It's an Arms Race", which became the highest charting song for band and their first to chart worldwide. Wentz commented on the band's decision to pick "This Ain't a Scene..." as the first single, saying "There may be other songs on the record that would be bigger radio hits, but this one had the right message." It was sent to radio weeks before its digital release in January 2007; upon digital release the track debuted and peaked at number two on