Dark Chevron/Boomerang shaped object manouvering1 object. I live under an MOA, heard T-38's flying, spotted dark colored chevron shape. At first I thought it could be a B-2 Bomber but the trailng edges appeared straight and there was no central bulge. Object was westbound about 400kts estimated speed. Disappeared into clouds which were reported to be at 4500' (I called local AWOS). The object made a 180 turn and returned from clouds at same altitude. the object then made several rapid zig-zag manouvers and then pitched down abruptly increasing velocity rapidly. object then made several abrupt turns while climbing up to original altitude. the object then turned to south heading away from my position on ground. I spotted the two t-38's in formation and moving above me at an altitude slightly higher than object which now was not visible to me.The jets appeared oblivious to the object and continued to manouver.I am a pilot and aerospace employee.This object did not manouver like any conventional aircraft that! i have ever observed. No lights were visible. object appeared to be close to the same size as the T-38 aircraft. max observed speed seem to be 800kts. object was silent, and did not cause a sonic boom.It seemed like it was chasing something smaller that i could not see. Distance at begining was estimated to be 2 miles final sighting appeared to be 4 miles as i lost visual contact. I have witnessed a similar object manouvering like this but at a much greater estimated distance. Wow I'd love to fly something as manouverable!