When one sits down to take a shit and inevitably pisses in the water before the first turd hits. Then when the first turd does hit, it splashes cold piss water onto one's balls and they shrivel up to the size of grape nuts.
The 1-hour period from at 1:00 to 2:00 AM on the second Monday of November where daylight saving will revert the time to 1:00, thus nullifying any failure of No Nut November during the period.