I have been living in an apartment in North Hollywood for almost a year now. It's a nicer development compared to the rest of the area. I can't say a day or night goes by without hearing some sort of strange noise bellowing from outside.
Here's a small sample...
Auction Guy

In a nearby lot, Auction Guy finds it necessary to auction off cars about twice a week in the morning for about 3 hours each time. Thanks to his giant sound system, we can clearly make out what cars nowadays are going for. Thanks Auction Guy!!
The Pterodactyl

I was ecstatic when I first heard the Pterodactyl squak in the early hours of the morning from a couple houses down. I love dinosaurs, and I love even more that they apparently exist now. But morning after morning of squaking leads to sleep deprivation as I ponder things like "Wait...Why can't I have a Pterodactyl myself? If I had one I'd train it to not squak so much. I'd train it to make funfetti cake from scratch"
The Crying Baby 2007

It just cries and cries and cries, all night long...and cries and cries and cries. Shut up baby, get a hobby or a job.
Cats

After living here a year there are not many noises I haven't heard coming from a cat. I can now tell when they're fighting, crying, molesting each other, paying taxes. Oh then there's the sound they make when they realize getting Arby's at 10PM on a Tuesday night just wasn't a good idea. I hate cats.
Ghetto Bird

How exciting a helicopter circling around my neighborhood with a giant spotlight skimming the gorund can be! I wonder if it's chasing a convict on the run who just broke into a bank, ran over a couple pedestrians, jaywalked and is now looking for cover in my neighborhood. At least I am protected by the walls of this townhouse and it's windows. I'm safe.
Revving Infiniti Engine Guy

Thanks for revving that engine, guy. I hope it makes you feel mighty powerful. I hope all the onlookers in our deserted townhouse alley are throwing themselves at you in awe.
The March 29th 11:05PM Creature
It was late. Windows open. It had been raining for a couple days. Zach and I were in my room talking. Then we heard the sound. A sound that can only be described as "an evil, menacing, creaturish laugh" ringing from directly below my window. Whatever made the noise scampered away immediately, fading into the night. Zach described it as "clearly being pissed off at something."
I just hope it wasn't this...

If it was, I'm moving. I'm confident it wasn't the creature above, though. The one we heard sounded furry.
What's outside your window?