As i was driving home from my sisters house in Spanish Fork, Utah on Thanksgiving evening.I was headed south on hyway #6, and was getting close to the junction of hyways #6 and hyway #89 when in the front window of my car i saw a disk shaped UFO coming straight down toward the top of a mountain top in the southeast corner of hyways #6 and #89. It was going so fast that i saw it for only a few seconds before it crashed.The crash was so bright that i could not see anything for a couple of seconds. The disk appeared to be a very dark green in color, and had a bright white halo of light that incircled the intire disk. My guess that the size had to be at least 100ft. in diameter. There was probably 5-6 cars on hyway #89 waiting to pull onto hyway #6. Also on the left side of hyway #6 just before the junction of #89 there were about 5 or 6 other vehicles parked there. I don't know what they saw because i kept on going because i figured that the military would be there very shortly, and i have heard of what they do to eye witnesses!!! When i got home in Price, Utah about 50miles away i turned on the TV to see if there were any reports of what i had seen. I saw nothing so about 11:00pm. i called the local TV station which is channel #2 and reported what i had seen. they told me that there were no other reports. that was the last of it. i have no pictures of it just a photo in my mind..thank you *(Wit's first name deleted--CMS/sg).