Originally Posted by skiahh
Besides being a lame activity in a car, skidding the wheels on a mtb, on a trail, violates good trail ettiquete. Just like locking up your brakes or skidding around a corner. Yes, I know the wheels are still turning, but they're also skidding and thus tearing up the trail.
Sandy beaches or snowy roads are OK, but don't do it out in woods.
And lift assisted. On properly maintained dh runs this is a full acceptable way of turning. Power sliding/countersteering is a very effective way to get around fast corners that might be a bit tight.