The kicking of Sahure is something that has confounded me. It is of course a natural phenomenon that a baby kicks in their mothers womb but the clear references to aspects of the gods which the other children represent has meant I have been researching the linkage of Sahure to kicking.
Sahu aside from being a god was also an aspect of the Egyptian concept of the soul refer here:
[en.m.wikipedia.org] [ancientegyptonline.co.uk] and [www.ancient.eu]
The Sahu aspect of the soul can thus be seperate from the body and be vengeful. Doesn’t quite explain the kicking. Look at the hieroglyphs for Sah in Lull and Belmonte though and you find it’s just one D61. Referring to wiki here
D61 is three toes oriented leftward. Perhaps toes ready to kick. The next step is to investigate the typical hieroglyphs for Sahure vs those present in Nederhof to tease out more.