Subject: Re: Video on DITM calls
He uses margin when put selling.

Harry Callahan, played by Clint Eastwood in the movie 'Dirty Harry', offered sage investment advice about this
"You've got to ask yourself one question: 'Do I feel lucky? Well, do ya, punk?"
(A 0.44 Magnum featured prominently in the scene)

A similar question can be asked about his use of a 'probability calculator', based on Black Scholes and its unrealistic assumptions.