A black triangle spun out of a billowing line of smoke and stopped dead,then took off at incredible speed.At the time, I was a shipper in a warehouse in Edmonton on a weekend golf trip to Sylvan Lake Ab Canada. Sylvan was so crouded that we chose to stay up the road at Gull Lake. There was myself, my girlfriend at the time and two other couples in our party. It was a beautiful day, I was laying on the beach with my head on my girlfriends lap. She was sitting up so her shadow was covering my face which allowed me to remove my sunglasses and marvel at the blue, cloudless sky without having to squint my eyes. I noticed a line of smoke form, not unlike the exhaust of a jet plane but much lower as I could see the billows forming at the front and being left behind as the trail continued to grow. It took me only one second to realize that there was no plane in front to cause this and as my stomach tightened to sit up, out of the front shot a black triangle spinning clockwise. It spun two-thirds of the way around and stopped dead. By the time I could say "what the fu-" , it took off in level flight across the sky and disapeared in the distance, not over the horizon, just into the distance. It moved as fast as a thought. No sound, no exhaust. As I finished my sentance "-ck is that?!!" my girlfriend looked up and said all she saw was a wisp of smoke disapate. I looked around to see if any one else was looking, but they were looking at me because of my outburst. I was so shocked by what I KNOW I SAW, I had to get up and walk back to the campsite. Aproximately two months later, my girlfriend handed me a newspaper article I believe was from the Edmonton Journal about variuos UFO sightings. half way through the article was the sentance "and still unexplained are reports of dark triangles seen flying over southern Alberta." I still have it somewhere, so I know somebody else saw it. I have since, through personal experience, been able to estimate the height at between six and eight thousand feet. This triangle did not come from the outer atmosphere, it entered this "space?" or "dimention?"! right before my eyes.((NUFORC Note: Date is approximate. PD))