I was driving home from work during a 4" snowfall. The roads were slippery and I was driving too fast for the conditions. The road I was on was a four lanes.....two each way. The speed limit on the road is 40 mph and I was going about that fast. I was in the left lane.......the right lane was open and someone pulled out from a side street onto the road but even though the right lane was open they had to go over to the left lane right in front of me. This of course ticked me off. I was in a hurry to get home. So I just moved over into the right lane to pass this car. After I got about 2 car lengths ahead I started to move over back into the left lane. When I started to change lanes I noticed a build up of snow between lanes.......too late. As soon as my car got into the build up of snow the rear end lost it and started to slide to the right. I immediately cranked the steering wheel all the way to the right.....turn into the skid right?..........the car almost went into a spin but held at about 45 deg. to the road and slid....it seemed like forever.......right down the road. Finally I felt the car come out of it but it was happening so fast the rear end went totally the other way.....I immediately cranked the steering wheel all the way to the left......steering into the skid yet again. The car almost went into a spin.......it was so close....but held at about 45 deg to the road sliding down the road. BTW at the first sign of the rear end loosing it I got off of the gas pedal and did no breaking. By this time the speed of the car had gone down enough so I then didin`t over correct. I put the steering wheel in the straight forward position and the car slid right and left abit and the settled down. I was then back in the left lane. The rush of adrenaline that hit me was such that my heart was racing and pounding so hard.....I got a pain in the pit of my stomache. Just a story I wated to tell here ............97 SC2. After that I drove the rest of the way home so slow. :) Man I got lucky. If I had gone into a spin I don`t know what I would have done.....there was oncomming traffic in the other lanes. Dan.