Falling from the Ceiling: The "hypnic jerk" and other random stuff

Why does the body jerk awake while sleeping? Why do Brits say "Cheerio" instead of "goodbye?" Why are daytime dramas called soap operas? These and othe probing questions answered! Become a supporter of this podcast: https://www.spreaker.com/podcast/thethinkingatheist--3270347/support.