battlefield 4 ufo easter egg?

so it was late i was playing bf4 on the map propaganda i was tierd i was captureing c when i heard a strange noise it was high pitched and i didnt know where it was comming from i seen nothing i looked in the sky and seen nothing. about 5 mins go by and was planning on going to bed soon i heard the noise agian and it was louder the other 2 people in my squad heard it aswell we were all very un easy as to what the hell was going on aroung 2 mins later the noise was back this time rlly rlly loud i looked up and seen a diamond shaped figure in the sky it did not look well designed it was very uneasy and it looked horribly programed it flew right over c and then over the rail way then it quickly shot off into the distance there was a dice dev on the server at the time of this event after i seen the ufo he quickly left the server and never joined back. i try and recreate it and try and make this thing appear agian but it wont so i have came to the conclusion that this thing was prolly triggerd by the dice dev but im not 100% sure. anyone else see anything like this plz if i could get some awnsers that would be great thanks.