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 top ten, it went on to spend a combined total of twenty-six weeks inside the top twenty and received a Platinum accreditation from the Recording Industry Association of New Zealand (RIANZ) for 15,000 shipments. In the United Kingdom, the album debuted at number three with 64,054 first week sales and made nine weeks in the top twenty, being certified Platinum by the British Phonographic Industry (BPI) for 300,000 units shipped. It went on to sell 446,807 in the UK to date January 2015. The album debuted at number two in Canada with 21,000 first week sales. "Infinity" was certified Platinum