Flying drone, hit something, lost all control of dronehen light gets brighter as flying away and fades out, then get control of drone

I was flying my drone at night in the middle of my neighbors field. The drone hits something when there is nothing in the area to hit. I lost all control of my drone and it flew off all on its own. A light
then appeared, small at first and as it started flying by myself and the other witness, it got brighter and bigger and then after it passed by it got smaller and dimmer and then disappeared. The light was visible as it flew by for about 40 to 50 feet. It did all this and the whole thing lasted about 5 to 7 Seconds. After the light was gone, I was then able to gain control of my drone and bring it back home. The witness and I just looked at each other. I know my mouth was hanging wide open is wonderment. we didn't say anything, just turned around and walked in the house.