charge/block rule

[toby]

yes i am here, and learning heaps.

i.e.,INITIALLY, both feet planted and facing the dribbler before contact occurs(defender may then be sideways without both feet planted as the dribbler continues in his path). Also, if the dribbler is able to get his head and shoulders past the defender's torso, the foul is on the DEFENDER. Otherwise, it is a player control foul.

why do the feet need to be "planted"?
Can't the defender stay in his cylinder and jump straight up?