when it hits, pinch your philtrum (the vertical groove below your nose and above your upper lip), and the cramp dissolves in a matter of 30 seconds or less. I just put my thumb inside my mouth, my index finger
on the philtrum, and squeeze really hard, and the cramp goes. Unfortunately it doesnt work for other cramps, but hey, just this is brilliant. I truly thought it was an old wives tale, but apparently not.
I do wonder how someone discovered this though... such a random thing.