Lee Ridley is a standup comic who doesn't speak. He has cerebral palsy and performs under the name Lost Voice Guy, even though he apparently never had one. Ridley's disability-themed routine is delivered by a synthetic voice machine. The machine itself, called a Lightwriter, is the focus for some of his jokes as he performed on Britain's Got Talent. -via Boing Boing
Not quite as bad as the first time Susan Boyle walked out in front of those jokers, but that's what I thought of as I watched.