I read what you wrote about Coach Pfaff and the notes you took while at the Level 3 school. I have a few questions that I was hoping you could answer.
1. Explain what he means when he says, "Multi-throws [i]reboot[/i] the CNS"?
If the athlete's nervous system is out of whack (firing patterns are wrong, inefficient recruitment patterns, etc.) multi-throws will help to address the problems.
2. How does general fitness work stress the glycogen system and how can it result in a "monster rebound"?
General fitness work is done in high volumes which puts the athlete into a state of glycogen depletion after which the athlete can overload their glycogen stores through proper nutrition. This is similar in theory to the old "carbo-loading" practices of distance runners.
3. Silly question perhaps, but why are sprint drills necessary to open the posterior chain? And how is this done?
Basically he's saying that sprint drills can help to loosen up the lumbo-pelvic-hip complex as well as the hamstring and gastroc areas. There are no special methods to accomplish this although Dan does prefer to do his sprint drills flat-footed.