We try to take a "group"picture whenever we take volunteers into the desert for a working party. Hard to get individual pictures of everyone, but they seem to hold still for a group shot. We eventually post the picture on the internet for all to see, but the real reason we take it is to identify someone who comes up missing.

When teaching survival, I frequently do this drill. I have someone that was rather unknown to the group, come forward for some reason, just for a moment or so. Then they quietly move out of sight.

About 5 or 10 minutes later I ask the group to describe the person. It is always interesting. Seldom correct.

Nomad