I have tried it using two method.

1. Create physics entity and disable it. On event it will be enabled.
But this method is not good solution if we have a lot of disabled physics entity.
I have tried it and FPS is not very good.
2. Create non-physics entity and enable event impact. On event it will be converted to physics entity.
In my example entity is falling down through the land after converted to physics entity. What 's wrong with it , Marco ?

Olzii