OK. Essentially, where I work has a warehouse area in the rear, with a receiving back door. We just so happen to reside next to a restaurant that serves Asian cuisine. I've eaten there, it's pretty standard-fare, nothing special, but I noticed you could see straight into the kitchen area from the main dining room, and daylight could be seen creeping in some side door... Well, turns out our side door and theirs are about 20 ft. apart, and theirs is usually open. During peak hours, I've been known to sneak up on the open back door and scream, occasionally making loud noises that mimic those of a puppy getting skinned alive. Naturally, the sound passes through the kitchen practically unscathed, and is directed towards the main dining area. One of these days I'm going to send someone in with a video camera as I do it.