Pushing my body to the limits of sleep deprivation, then walking on a 4x4 wooden plank 30 ft high off the ground, with gravel, stones, and glass waiting if I fell.
Or shaving with a circular hand saw.
...
Or walking straight up to a guy with a gun to help a woman I'd never met or knew before hand and told him to stop or else I was going to make him. Its rather... mmmm....sobering, to have a man laugh at you while he points a nine mm to your head and tells you he'll give you a five second head start.