Might be a scene with heaps of moving objects and stuff
I don't think so Matt. Due to the nature of a HDR you will loose dark shadows and bright highlights. So to make photo not look flat you have to fix this afterwards. This is not hard to do if you have something like Lightroom. Its simply a matter of opening the tone curve and darkening the shadows - (drag left hand side down a little) and making the highlights a little brighter (drag light hand side a little up)