Only one craft, travelled at high speeds, Bright glowing, low humming in UtahMy wife and I were relaxing outside our ranch when the sighting occured. A night on the ranch is usually quiet and calm but not this night as I felt the cattle were a little uneasy. I was the first to witness as the wife was inside making some drinks. It began with cattle bcoming more destressed and as I went to investigate thats when it happened. A low but very clear huming noise coming from northern hills, myself I was feeling alittle uneasy as the cattle were never like this. The noise incresed to an even deeper hum although nothing was visible at this stage. The wind began to pick up and from over the hills came something moving in the distance. A very bright object traveling very fast, it moved over my head at a low altitude. At that point I called the wife. As she arrived I had my eyes fixed on the object, I heard my wife ask what was wrong but then I could feel fear coming over her as well. Our eyes were both fixed on this single disk shaped object which moved off into the distance. At that point I thought our sighting was over but how wrong I was. The craft not only returned in our direction but also reduced its speed. The craft almost came to a standstill about 150metres away from us. The ship just hovered for I am guessing a time 7mins. THe ship then took off at a great speed and then circled back over our heads and that what the lsat we saw before it travelled south.