Looked like star, but we could tell it was in the atmosphere.

My wife and I were parked on the edge of the lake at core creek park.  We were talking for a while and we noticed an object that looked like a star.  We could tell it was in the atmosphere, and it came from the southeastern sky.  
The object was moving at an unbelievable speed, and it stopped on a dime, instantly.  
We kept watching it, and it stayed there for 10 to 15 seconds.  Then, it instantly, and with great speed, shot to the right, and stopped instantly.  
Now, from the distance we were viewing it, it must have been traveling miles, but did it within a split second.  
The object stayed in that spot for another 10 to 15 seconds.  Then, it shot to the left with the same incredible speed, and stopped again, effortlessly.  
The object repeated this back and forth, zig zag, about eight times, while staying in one spot, each time it stopped, for 10 to 15 seconds.  
From where we were viewing it, it made the shape of a triangle, and when it got to the top, it shot up, out of the atmosphere, again, with great speed.  
This was our first sighting, and we were spooked, to say the least.  It was incredible, all of our skepticism was over, now we new ufo's were real.  
Until you see a ufo for yourself, it is hard to believe; we are far from crazy.
One of three reports from the same, seemingly credible, source.  PD