Reminds me of the time I accidentally made the Nazi salute in Theresienstadt. That was... terrible.

You see, there's a part separate from the ghetto called the small fortress which was used to house political prisoners. I went all the way to the wall used for executions and wanted to take a photo of the area from there, but the sun was shining into the camera, so I tried covering it with my hand, but it was visible in the shot. So I slowly extended it, focusing on keeping the shadow on the camera and trying to find the right angle so it would not be in the shot.

Then I suddenly realised what it must look like and was absolutely mortified. Luckily nobody was looking in my direction at the time...