People don’t sneeze in their sleep due to their brain shutting down the reflex.
The chance of a coin landing heads-up is not 50-50
War pigs were used in ancient warfare to counter against war elephants, which feared the pigs (and their squeals) and would bolt. War pigs were sometimes lit on fire to enhance this effect.
Alexander the Great encouraged his men to shave so enemies couldn't grab their beards during battles.