'The Gardening Australia Gooch Sketch' is a sketch from Episode 11 that ends in a blast off (the second such sketch to do so). The sketch starts as a parody of ABC TV show 'Gardening Australia' wherein the presenter (Greg) interviews Roger and Tanya Miller at their garden in the arid South Australian desert. Roger claims to have found the aquifer that now supplies the garden thanks to his sensitive perineum (or 'gooch').
It turns out that Roger's perineum is very large and can detect the smallest amount of moisture. As Tanya says 'the South Australian government is interested in that'. The sketch is notable for the many synonyms for gooch used, including (but not limited to) 'taint', 'briar patch', 'smelly bridge', 'great divide', 'grundle' and 'Klingon's forehead'.