UFO Sighting in Parker, Colorado on July 21st 2015 – Went down under horizon, lifted to hover then sped off NW

Was standing in the driveway looking at the sunset. Our house faces NW, I was looking west. Saw a few birds maybe a couple bats since it was dusk. But the birds were gone and saw an object just sitting there (not a bird for sure, was only seconds) there was no wind, as birds seem to hover and fly on the wind. I saw this black thing to the west and for a second thought it was a bird. But it dived straight down under the horizon much faster than a plane or bird. I sat and thought that I should go get my phone or camera cause my eyes didn't believe what I was seeing. Not 5 seconds later, "it" shot up to exactly where it came from, hovered for a few seconds then flew at a right angle in a NW direction, I think cause it went horizontal and disappeared after like 2 seconds. Felt like my eyes weren't fast enough after about 1/2 to 1 second. My husband had seen a similar object near Tucson in 1996, but of course I laughed it off. He never mentioned it til today when I saw this. I'm okay now, still a little freaked out but breathing. Of course doubting myself.......but cant get the sight out of my vision. I know what I saw. It wasnt normal. I hope that you understand and dont think im crazy. Cause i think I'm crazy. But I had to tell some one what I saw. Tonights sight will never leave my mind.. Thanks for reading, Jenny Richardson