I often practice this skill (and have now trained Tarzan) when I see a group taking pictures of each other not inclusive of everyone there, or if they are attempting a selfie with a scenic background.
In the past couple months I have been turned down when asked if I could take their picture while said person was in process of selfie. Saddened by the need of my retirement gig waning I have still been on the lookout where my talent is needed.
Today while in process of a hot chick selfie the offer came asking if we wanted assistance. My first reaction was no (am I really transitioning to the outside world? Or do I just know how it do a better angle?)
I conceded and we had the photograph taken.