I live in the mountains. Lots of snow. I drive a four wheel drive pick up because of this.

One very cold morning driving up a mountain going to work I drove around a very sharp corner moving at an EXTREMELY low speed. My truck did a 180 degree spin & I found myself still on the road but going down the mountain. I couldn't believe it. I sat there for a few minutes wondering what had happened & then what might have happened.   

I put proper winter tires in my truck and I am constantly amazed at the difference in control.

PS: When my boys started to drive, I told them that when you put your foot on the brake of a four wheel drive vehicle on ice, it is four wheel slide just like any other vehicle. As adults they still remember & laugh about "four wheel slide" but they remember.