Wasn't sure where to put this. I love this kind of stuff...
As a very young coach many moons ago I attended a clinic with Barry Switzer, John Madden and Harry Gamble( coach at Penn) . Switzer was a complete showman joking and telling stories he had everyone laughing and just eating up his entire act ( unrealistic football stuff for HS coaches), John Madden talked about details of special teams( again unrealistic because you’d need 2 hours of practice to make it work) he was very serious there were no jokes or stories. Harry Gamble was by far the most effective and knowledgeable. He followed both Switzer an Madden and seemed to know more about coaching than either of the main event star coaches. He went on to become the GM of the Philadelphia Eagles.