execute on the dedicated server with you the only player

_unit = createGroup west createUnit [typeOf (playableUnits select 0), (playableUnits select 0) modeltoWorld [0, 10, 0], [], 0, "none"]; _unit allowdamage false; _unit setPos (_unit modeltoworld [0,0,10]);

observe unit fall down, then raise over ground in few seconds, after maybe 20 seconds it will touch the ground again.