Grey boomerang in sky. dear bob spearing i can answer your questions but some questions may be not clear, i will directly answer. 1. i saw that in at suranaree university of technology in nakhon ratchasima province (far from bangkok about 250 km) 2. 30 march at about 8:00 pm in thailand that time is dark (same night when i sent first mail to you) 3. 2 ( me and my girlfriend) 4. this question is difficult to answer but it so big and may be same level with cloud 5. no, it don't have noise (i still waited for listening because i want to know like you but it don't make any sound or noise) 6. from question 4 i saw that so big ( i am not sure its attitude but quite near me and it is bigger than boeing about 10 times up) and that still keep boomerang shape across the sky when i see 7. it take 1-2 minites to across the sky ( i time from i see to i cannot see) and its move in same velocity 8. no, i see only grey or white ( in night ) 9. may be southwest to northeast 10. horizontal 11. straight and quite smooth 12. quite clear sky but have some clouds 13. near airborne division but it's not airplane or some vehicle because it so big 14. i'm 26 years old and studying master's degree in physics at this university i want to tell you more data, i and my girlfriend searched and saw from some vedio in youtube then that thing which we saw it was low level (attitude) and bigger than another in many vedio. it is real story.