Sometimes walking up to a person and taking their photo, something I do on a rather regular basis, doesn’t scare me.  Sometimes I am convinced someone is going to snatch the camera out of my hand and smash it to pieces.  When the second scenario occurs I pretend to fiddle around the camera and hope the sound of where ever I am drowns out the sound of the shutter clicking.

Here we have an example of scenario #2:

It looks a bit incidental because that is exactly what it is.