I used to like doing broadies, as we called them back then/there - broad slides I suppose. I did some quite impressive ones. Back pedal brakes, head of steam, bike sideways and slam on the brake. Success, and judges points, on the basis of how much dust you raised, gravel displaced and trail left. Points docked for high siding or not holding on to the bike.
These days, I think my achievements are measured more by NOT doing (either voluntarily or otherwise) the above.