Z and rockyroad...we will have to discuss this topic at our clinic next year. (East side of Washington State)
I guess I missed the boat on this one...I thought the "player on the ground" scenario was a block/charge situation or a defender "plowing" through a screen and displacing a screener.
I would have a hard time calling a foul on the defender if he hit a legal screener and then the defender fell on the ground. whew!

(Maybe we could ask Cindy Adsit for some clarification)
Also, our clinician stated that if you are not sure what to call on a block/charge...then it is a charge.
Concerning the later, is that what you guys on the West side are being told?