Funnyman John Cleese is undergoing tests to solve his sleep disorder problems. The former Monty Python star posted a photo on Twitter.com on Tuesday (04Jun13) just before a test. He wrote, "Here I am wired up for the night to see if I'm suffering from Sleep Apnea (sic)." Sleep apnoea is a sleep disorder characterised by pauses in breathing. In severe cases, the fear of sleep due to sleep paralysis can lead to insomnia.