One time while trail riding years ago when our area used to have lots of snow, A freind and I went to an area know for large drifts. It was a fence line running north to south that seperated two huge corn fields. The fence was on the edge of a gradual drop off of about ten feet between the two fields. The constant West winds would blow the snow across the upper field, large drifts would form at the drop off. This day was after a big storm and we wanted to bash the virgin drifts. Needless to say we were having a blast. I had driven to the top of the drift and was hopping along like riding on the clouds. Suddenly with out warning I found myself right on the very edge of a large cuttout in the drift. I skidded to a stop but it was too late. Everything felt like it was in slow motion, like in a dream. I simply rolled over the edge and slid gently down the face of the cuttout. There I was completely un hurt burried under the snow and my machine was upside down, track up, pinning me there. The only thing that wasnt hilarious about the whole thing was my gas was running out. After I freed myself I was concerned about my friend possibly falling on top of my machine. When I clambered back up the drift all I could see was my friends sled and only the head and shoulders of my friend. He had seen the whole thing and was going to try and rescue me but when he stepped off his machine he sunk immediately to his arm pits and became stuck. I had to rescue him. What had happened was a large tree on the lip of the drop off had caused the cuttout to form. I learned from this and now even on smaller drifts I look for trees and know the drift will be cuttout at that point. Oh yeah the sled was un damaged too even though it fell upside down ten feet. The snow was just too fluffy. It was hard to start though. I wish I had my camera.