As part of an exploration of photographing retail spaces as discreetly as possible I have used the old trick of leaving the camera on the floor for the shot. It is amazing how a crowd will naturally part to avoid treading on a camera lying prone on the ground. These are the very same people who wouldn't give a second thought to a hip and shoulder bump to secure their unobstructed passage.
This image took two attempts. During the first attempt some random shopper decided to briefly peer into the lens as they waled on. The second was like clear of any visible life form!
In all attempts I use the 10 second timer giving me enough time to press the shutter first, place the camera on the ground and then back off to a clear distance for the configured exposure.
Photo: Robert Rath, '366 Days of 2012, Day 357 - Temple of Retail'. 1/60s f/11 ISO160 17mm
... more at http://robertrath.com