Ready, Steady, Go

I like street art and particularly the more useful pieces, like seats.This one in Swanson street Melbourne is quiet fussy and busy and deep with a very busy area. I only had my mobile phone, so I started my HDR Camera+ app and waited for a group of pedestrian and a tram to go by, thinking I would have a clean shoot at the three exposures required. Well as I pushed the button the lights changed and all the folk in the background moved. Yet in the enhanced image, they are not blurred and they are in their original position in the first photo. So I need to learn a little more of the magic by which this app does its processing to get a Higher Dynamic Range.