Here's my story...
My buddy and I were cruising up in the hills above Cle Elum, Washington. Awesome day. Fresh snow, no precipitation in the air, calm, and peaceful. We stopped and enjoyed the scenery.
Dave takes the lead, and 2 miles later, I'm seeing red dots between his tire tracks. We stop, and he finds that he's leaking ATF. We freak. Immediate decision to turn around and head back down the mountain. I'm behind Dave, so I turn first.
Before I continue, we're on a posted CLOSED road to automobiles. But a sign can be overlooked by mistake or on purpose. All we've seen on this "road" has been snowmobiles. Lots of them.
Now, when my back tires left the snow pack from the snowmobiles.... THUMP. I sank to the axle. And, the snow offered no traction at all.
I didn't have a winch at that point, neither did Dave. He had a chain-pulley come-along, which we used to pull me out. Took us 2 hours, and we had the road completely blocked off, which pissed off the snowmobile riders.
Since then, I've bought a winch.