Joel has decided to have his ex-girlfriend, Clementine, erased from his memory because she had erased him from her memory. At the start of the procedure, the "doctors" put items that remind Joel of Clementine in front of him as they monitor his brain activity. Parts of his brain light up on the machine as he thinks about Clementine. Joel's thoughts are illustrated as incoherent events as the procedure progresses.
Beakman explains how hair grows starting with the hair follicle, why hair falls out and why different hair is different lengths. He also explains why hair is not living and how hormones affect hair growth.