
Free throw rules:
http://www.nba.com/analysis/rules_9.htm ... rticleList
a. When a free throw is awarded, an official shall put the ball in play by placing it at the disposal of the free throw shooter. The shooter shall be above the free throw line and within the upper half of the free throw circle. The same procedure shall be followed each time a free throw is administered.
question is could he gain enough momentum in such a short space
EDIT: Whoops there is a section 10 that stipulates
d. The free throw shooter may not cross the plane of the free throw line until the ball touches the basket ring, backboard, or the free throw ends.