The object changed its speed rapidly.at firsst I tought, tht is a shiny big bird not moving its wings, then it rapidly changed speed (stil with no movements of wings) I changed my zoom to long position - too long to find the subject. So this is only picture I posses. Size of this subject was not too big - 1-2meters, but I may be wrong. I am shure, this was no bird. Was to shiny. No sound, no moving parts, no smoke or other fog.