Spins and Stalls, from Todd Tracy
When a helicopter has an engine failure the pilot will make use of “autorotation” whereby the upward motion of the airflow through the rotor will cause the blades to continue spinning allowing for a safe return to earth.
However, sufficient altitude is required to avoid a hard landing. In a helicopter altitude is your margin. The intuitive notion that a helicopter without engine power will fall out of the sky is false.
There are a lot of correlations to the markets in flying a helicopter, the most obvious is that one tends towards overcorrection.