During radio programmes of the 1920s and 1930s, the background noise for crowd scenes was often achieved by a moderately large group of people mumbling "rhubarb" under their breath with random inflections. This was often parodied by Milligan, who would try to get the same effect with only three or four people, clearly intoning the word rather than mumbling. After some time, Secombe began throwing in "custard" during these scenes (for example, in "The Fear of Wages and Wings Over Dagenham", where the phrase was amended to 'flying rhubarb').