Many physicists and physiologists suspect that fibrillation is chaotic, and are trying to model it in order to find ways of stabilising the dangerous convulsions.
But that message is best delivered by parents, teachers, physiologists and even children, none of which were present as a demonstration of mainstream American support for gun rights.
Since 1997 the USSA has added about 17 full-time conditioning coaches, physiologists, nutritionists and psychologists, developed a training plan it shares with hundreds of junior clubs and started concentrating its spending on the top performers.
Amid all this, Dr Ashcroft develops an amusing recurring theme about the willingness of physiologists over the years to perform experiments on themselves in order to advance their understanding of the limits of human endurance.