[Hitman]

Sometimes fog, mist, a cloud, or an airlayer of special density which also holds pollution can act as a cinema screen, so that powerful lights projected form elsewhere (F.e. Lasers from a Disco, fireworks, etc.) form strange results there. Reverberation of light in the atmosphere has sometimes such effects.

Judging from your pictures it seems to me possible that those are just reflections in the air of something originated elsewhere (Though of course you have seen them moving and might judge the pattern better).