His broadcasting sign-off consisted of a nonsense word, "thermostrockimortimer," the meaning of which (if any) was never made public. Cactus stated that, "The phrase is in the Bible; if you don't find it, keep reading."
Cactus's broadcast sign-off included a seemingly meaningless word, "thermostrockimortimer," which he hinted had biblical roots, encouraging listeners to persevere in their search for meaning.