I was traveling northbound on hwy 27 at i4 at a slow roll due to traffic. i observed an egg shaped white object flying westbound above i4 cross over hwy 27 at approximately 400 agl. the object did not have a tail or rotors. once the object crossed over hwy 27 it changed course to northwest and accelerated at a high rate of speed. when it changed direction i could see it did not have any wings either. it only took it a few seconds to be out of eyeshot. i am an agency drone pilot that works this area and was working at the time. clear day with broken clouds at 5,000 feet.