@Override
	public boolean invoke(MOB mob, Vector commands, Physical givenTarget, boolean auto, int asLevel)
	{
		if(lastPosition==null) lastPosition=mob.getStartRoom();
		if(lastPosition==null) return false;

		if(!super.invoke(mob,commands,givenTarget,auto,asLevel))
			return false;

		final boolean success=proficiencyCheck(mob,0,auto);
		if(success)
		{
			final CMMsg msg=CMClass.getMsg(mob,null,this,verbalCastCode(mob,null,auto),auto?"":_("^S<S-NAME> @x1 for a position check.^?",prayWord(mob)));
			if(mob.location().okMessage(mob,msg))
			{
				mob.location().send(mob,msg);
				mob.tell(_("The trail from @x1 to here is: @x2",lastPosition.name(),trailTo(lastPosition,mob.location())));
				lastPosition=mob.location();
			}
		}
		else
			beneficialWordsFizzle(mob,null,_("<S-NAME> @x1 for a position check, but fail(s).",prayWord(mob)));

		return success;
	}