Hi guys, I really could use some help with my flash game. It's the last error in an otherwise bug-free game, but I can't seem to fix it.

So I have a game where the hero (luna) has to collect stuff and must avoid getting hit by stuff (in my case it's broccoli). When the hero gets hit by a broccoli, she goes into "ouchpause", a short moment where she can't move. There's also a function called "ouchstoppen" where the game decides when to stop the "ouchpause".

The game is timed and the error I get occurs when the hero is in the "ouchpase" the second the game ends. Otherwise, the game ends smoothly. This is my error:

PHP Code:
TypeErrorError #1009: Cannot access a property or method of a null object reference.     
at sleepytime_Final_fla::MainTimeline/ouchStoppen()
at Function/(URL)/AS3/2006/builtin::apply()
at SetIntervalTimer/onTimer()
at flash.utils::Timer/_timerDispatch()
at flash.utils::Timer/tick() 
and this is (what I hope to be) the relevant AS3 (I marked a few passages bold where I assume the error to be):

Code:
for (j = 0; j<game.brokkolibedarf; j++) {
	// Creating the first broccolis
	brokkoli[j] = new Brokkoli();
	brokkoli[j].x = Math.random()*stage.stageWidth;
	brokkoli[j].y = Math.random()*stage.stageHeight*(-1);
	brokkoli[j].addEventListener(Event.ENTER_FRAME, brokkoliVerhalten);
	addChild(brokkoli[j]);
}

var ouchInterval: uint;

function brokkoliVerhalten (e: Event): void
{
	e.target.y += game.brokkolispeed;
	if (luna.hitTestPoint(e.target.x, e.target.y, true)) {
		game.ouch = true;
		luna.gotoAndPlay("ouch"); // Abspielen der Autsch-Animation von Luna bei Kollision mit Brokkoli
		ouchInterval = setInterval(ouchStoppen, game.ouchpause);
		game.punkte -= 3;  // Punktabzug bei Kollision zwischen Luna und Brokkoli
	}
	if (luna.hitTestPoint(e.target.x, e.target.y, true) || e.target.y > game.bottomBorder) {
		e.target.x = Math.random()*stage.stageWidth;
		e.target.y = Math.random()*stage.stageHeight*(-1);
	}
}

function ouchStoppen() {
	game.ouch = false;
	luna.gotoAndStop("stand");
	clearInterval(ouchInterval);
}

game.endeZeit = getTimer()+game.gesamtzeit;
game.balkenLaenge = zeit.zeitbalken.width;

zeit.addEventListener(Event.ENTER_FRAME, zeitAnzeige);

function zeitAnzeige (e: Event): void
{
	var jetzt = getTimer();
	var restzeit = game.endeZeit-jetzt;
	// passt den Zeitbalken an
	var neueBreite = game.balkenLaenge*(restzeit/game.gesamtzeit);
	zeit.zeitbalken.width = neueBreite;
	// Time has run out
	if (jetzt>=game.endeZeit) {
		zeit.removeEventListener(Event.ENTER_FRAME, zeitAnzeige);
		luna.removeEventListener(Event.ENTER_FRAME, bewegen);
		punktebox.removeEventListener(Event.ENTER_FRAME, punkteZeigen);
		for(var i : int = 0; i < game.eisbedarf; i++)
		{ 
			eis[i].removeEventListener(Event.ENTER_FRAME, eisVerhalten); 
		}
		for (var j : int = 0; j < game.brokkolibedarf; j++)
		{ 
			brokkoli[j].removeEventListener(Event.ENTER_FRAME, brokkoliVerhalten); 
		}
		for (i = 0; i < eis.length; i++)
		{
			removeChild(eis[i]);
		}
		for (j = 0; j < brokkoli.length; j++)
		{
			removeChild(brokkoli[j]);
		}
		gotoAndStop("spielEnde");
	}
};
Can anybody help? I'm really clueless here.

Thanks in advance!