The League of Gentlemen

'The League of Gentlemen' is a British black comedy series that ran for three seasons between 1999 to 2002 on BBC Two. The show is set in the fictional Northern English town Royston Vasey and looks at the lives of its odd townspeople. It was followed by the film 'The League of Gentlemen's Apocalypse' and the stage play 'The League of Gentlemen Are Behind You!'.

S3E4: The Medusa Touch
Daddy, a suburban sex guru, puts auto-erotic asphyxiation fetishists in inflatable rubber suits and controls their oxygen supply to stimulate them. However, he has a heart attack after he turns the oxygen supply off, and fails to turn it back on before dying, leaving the people stuck in their suits.