I always found Hitler's "Heil Hitler" salute to be vaguely effeminate (elbow bent, palm facing upwards, fingers pointing back to his faceālike he's carrying a platter in front of him), but then it occurred to me that, while everyone else had their arms outstretched towards him, he may have literally been saluting himself.
It was an act of accepting the salute of others. This is covered as part of a more in-depth answer on the salute as a whole here.