When In-Camera HDR goes wrong

Today Clare and I visited Castle Chillon, on the shore of Lake leman. It was another scorching day. Over 30 degrees and many of the tourists visiting the castle were cowering beneath umbrellas. Having been doing some in-camera HDR with the Can0n 5D I forgot I was still on HDR mode when I snapped a couple of tourists avec umbrellas. The result was "interesting".