over an back rule?

[HokiePaul]

For #1, I don't see how this can happen on a throw in. The throw in would be over before the defender could knock the ball away from the offense.

Assuming that the offense has team control in the front court, and assuming that when the offensive player jumped, they were still in the frontcourt, then #1 would be a backcourt violation. (team control in front court, last to touch in front court, first to touch in back court).