[crazy voyager]

this is a charge with one exception.

If the jumper took off and the defender moved in where he was landing (that can be the same place he took of, OR the place where his movment is taking him e.g if you jump forward you'll offcourse land on a spot forward from the take off)
If the defender moved in the jumpers "to be cylinder" at the landing spot it is a block (it could even be an unsportsmanlike) in other cases the jumper has landed and simply runs down the defender- Charge

I heard a really good comment on this a few days ago
The man with the ball is like a person driving a car. He has the right to be on the way, but if a pedestrian walks in the way, you're not gonna drive him over, you turn the wheel. If a defender moves in your way, you have to move around him.