spawn a physx object in the editor, (a car, a rice bag, etc)
name it obj1
stand 5 metres away from it and execute
obj1 attachTo [player];
now walk towards a slope so that the object appear to be in the air
execute
detach obj1;
Observe how physx object remains in the air
shoot at it and it falls down instantly
In case of a car you can get in to any seat and the car will be suspended in the air. Shooting it or trying to drive it will make it fall to the ground.