Torpedo - Electric ray - Ray of light

Play of words, I was imagining that a spinning (8) moving through a medium, is like a launched torpedo that shoots through water at a constant speed. This made me look up 'torpedo' at wikipedia and it turns out that the word torpedo comes etymologically,  from a genus of electric rays in the order Torpediniformes (link). So a ray of light and ...

... this made me think of the animation of the motion of a rotating (8) posted at topic From a Soliton to an (8)-ball, it looks a bit like a ray swimming due to its quadrilateral shape : )