+ MovingObject* moving_object = dynamic_cast<MovingObject*> (&other);
+ bool is_portable = ((portable != 0) && portable->is_portable());
+ bool hit_mo_from_below = ((moving_object == 0) || (moving_object->get_bbox().get_bottom() < (get_bbox().get_top() + 7.0)));
+ if(bouncing && !is_portable && hit_mo_from_below) {