(For this skit to work, you need to have the angry neighbor be played by an adult who the kids do not know. A good idea is a man on your committee. It's crucial that no kid recognizes this guy, though.)
First appearance: angry neighbor knocks on the door loudly, claiming a car is parking his driveway (which is a leaders car, and they go out to move it). Angry neighbor is slightly ticked off, and asks for everybody to try and hold it down a little.
Second appearance: after a song (preferably a loud one), angry neighbor knocks again louder, and is angry because of the noise. He asks who's in charge of this, and a leader tries to calm him down. The neighbor says stuff like he just got home from a long day at work, and he can't relax with all the noise. He's a little louder this time, and a little more confrontational. After the leader reassures the angry neighbor, he leaves. By this time, the kids probably can't believe what a jerk this guy is.
Third and last appearance: a few minutes later, during one more really loud song, (or a loud game, or anything loud) he busts in the door, and gets right in the leaders face, poking him in the chest, telling him he's going to call the police if he doesn't shut this "meeting" down immediately. Then, the leader starts to get mad back. He reaches behind something, (a counter or anything) and produces a cream pie and smashes it in the face of the angry neighbor, then grabs him by his shirt and throws him out the door. The kids either are hooting and hollering, or are freaked out that the leader would actually do something like that.
Next, (and this is important) the leader brings the angry neighbor back in, and tells everybody it's all a gag. This skit is a great way to introduce the kids to a guy on committee (who doesn't mind getting thrashed), and also show another adult who loves YL and kids.
Remember: if one kid knows about it early, it'll probably blow the whole thing. You can't do this very often, not even once a year, because a kid will probably remember it, and then pipe up during club. Have fun!
2 hours ago