Extract from the basic physics tutorial:
[quote]For example, if you use Set Position to move an object to the other side of the layout instantly, it has effectively teleported. That's not a realistic physical phenomenon, so the result may be unrealistic as well.[/quote]
Event2 and event6 you teleport the box.
Check out : Player (platform behavior) and Physic (world objects) - LINK
, listed in the how do I FAQ, i think it does in fact spawn/displays either physic, either platform objects, depending on the state.