I am afraid of forgetting the Pythagorean theorem when crossing a bridge and
some magical creature stops me, and asks me what the hypotenuse of a equilateral triangle is, and I don't know that it is a trick question because I am thinking "a squared b squared" and all that, and I can't answer and plunge to my death
down a deep, deep crevasse filled with a moving river of maggots.
That, and Carnies.