Between 11 and 17th September 2021 Mark lectured for 140 hours and 42 seconds. During the lecture Mark raised almost £13k for Barnardo’s, engaged with schools around the world through some prepared lesson plans and worked with sleep scientists to explore the impacts of extreme sleep deprivation, a state that few on the planet have experienced. The lecture pushed Mark to his physical and psychological limit as he suffered memory loss and hallucinations having just had 3 hours sleep across the 140 hours. Now he wants to use this experience to educate others of the importance of sleep.